diff --git a/core/java/android/app/INotificationManager.aidl b/core/java/android/app/INotificationManager.aidl
index 7f38b27..ec5effd 100644
--- a/core/java/android/app/INotificationManager.aidl
+++ b/core/java/android/app/INotificationManager.aidl
@@ -98,6 +98,7 @@
     ParceledListSlice getNotificationChannelGroupsForPackage(String pkg, int uid, boolean includeDeleted);
     NotificationChannelGroup getNotificationChannelGroupForPackage(String groupId, String pkg, int uid);
     NotificationChannelGroup getPopulatedNotificationChannelGroupForPackage(String pkg, int uid, String groupId, boolean includeDeleted);
+    ParceledListSlice getRecentBlockedNotificationChannelGroupsForPackage(String pkg, int uid);
     void updateNotificationChannelGroupForPackage(String pkg, int uid, in NotificationChannelGroup group);
     void updateNotificationChannelForPackage(String pkg, int uid, in NotificationChannel channel);
     void unlockNotificationChannel(String pkg, int uid, String channelId);
diff --git a/packages/SystemUI/res/layout/notif_half_shelf.xml b/packages/SystemUI/res/layout/notif_half_shelf.xml
index 37b8ae0..c70f8e2 100644
--- a/packages/SystemUI/res/layout/notif_half_shelf.xml
+++ b/packages/SystemUI/res/layout/notif_half_shelf.xml
@@ -22,8 +22,7 @@
         android:layout_height="wrap_content"
         android:layout_gravity="center_horizontal|bottom"
         android:paddingStart="4dp"
-        android:paddingEnd="4dp"
->
+        android:paddingEnd="4dp">
 
     <LinearLayout
         android:id="@+id/half_shelf"
@@ -82,11 +81,21 @@
                     android:theme="@style/MainSwitch.Settingslib"/>
             </com.android.systemui.statusbar.notification.row.AppControlView>
 
-            <!-- ChannelRows get added dynamically -->
-
+            <ScrollView
+                android:layout_width="match_parent"
+                android:layout_height="@dimen/notification_blocker_channel_list_height"
+                android:clipToPadding="false">
+                <LinearLayout
+                    android:id="@+id/scrollView"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="vertical">
+                    <!-- ChannelRows get added dynamically -->
+                </LinearLayout>
+            </ScrollView>
         </com.android.systemui.statusbar.notification.row.ChannelEditorListView>
 
-        <RelativeLayout
+        <LinearLayout
             android:id="@+id/bottom_actions"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
@@ -98,25 +107,23 @@
                 android:text="@string/see_more_title"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:layout_alignParentStart="true"
-                android:layout_centerVertical="true"
-                android:gravity="start|center_vertical"
                 android:minWidth="@dimen/notification_importance_toggle_size"
                 android:minHeight="@dimen/notification_importance_toggle_size"
                 android:maxWidth="200dp"
                 style="@style/Widget.Dialog.Button"/>
+            <Space
+                android:layout_width="0dp"
+                android:layout_height="match_parent"
+                android:layout_weight="1" />
             <TextView
                 android:id="@+id/done_button"
                 android:text="@string/inline_ok_button"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:layout_centerVertical="true"
-                android:gravity="end|center_vertical"
                 android:maxWidth="125dp"
                 android:minWidth="@dimen/notification_importance_toggle_size"
                 android:minHeight="@dimen/notification_importance_toggle_size"
-                android:layout_alignParentEnd="true"
                 style="@style/Widget.Dialog.Button"/>
-        </RelativeLayout>
+        </LinearLayout>
     </LinearLayout>
 </FrameLayout>
diff --git a/packages/SystemUI/res/values-land/dimens.xml b/packages/SystemUI/res/values-land/dimens.xml
index 259b9ad..cfb4017 100644
--- a/packages/SystemUI/res/values-land/dimens.xml
+++ b/packages/SystemUI/res/values-land/dimens.xml
@@ -89,6 +89,9 @@
     <dimen name="global_actions_button_size">72dp</dimen>
     <dimen name="global_actions_button_padding">26dp</dimen>
 
+    <!-- scroll view the size of 2 channel rows -->
+    <dimen name="notification_blocker_channel_list_height">128dp</dimen>
+
     <dimen name="keyguard_indication_margin_bottom">8dp</dimen>
     <dimen name="lock_icon_margin_bottom">24dp</dimen>
 </resources>
diff --git a/packages/SystemUI/res/values/dimens.xml b/packages/SystemUI/res/values/dimens.xml
index d5658dc..0ee5da2 100644
--- a/packages/SystemUI/res/values/dimens.xml
+++ b/packages/SystemUI/res/values/dimens.xml
@@ -313,6 +313,8 @@
     <!-- The space around a notification menu item  -->
     <dimen name="notification_menu_icon_padding">20dp</dimen>
 
+    <!-- scroll view the size of 3 channel rows -->
+    <dimen name="notification_blocker_channel_list_height">192dp</dimen>
     <!-- The vertical space around the buttons in the inline settings -->
     <dimen name="notification_guts_button_spacing">12dp</dimen>
 
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ChannelEditorDialogController.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ChannelEditorDialogController.kt
index 4114eb2..a8d59d8 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ChannelEditorDialogController.kt
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ChannelEditorDialogController.kt
@@ -71,15 +71,15 @@
     private var appUid: Int? = null
     private var packageName: String? = null
     private var appName: String? = null
+    private var channel: NotificationChannel? = null
     private var onSettingsClickListener: NotificationInfo.OnSettingsClickListener? = null
 
     // Caller should set this if they care about when we dismiss
     var onFinishListener: OnChannelEditorDialogFinishedListener? = null
 
-    @VisibleForTesting
-    internal val paddedChannels = mutableListOf<NotificationChannel>()
     // Channels handed to us from NotificationInfo
-    private val providedChannels = mutableListOf<NotificationChannel>()
+    @VisibleForTesting
+    internal val channelList = mutableListOf<NotificationChannel>()
 
     // Map from NotificationChannel to importance
     private val edits = mutableMapOf<NotificationChannel, Int>()
@@ -93,14 +93,14 @@
     private val channelGroupList = mutableListOf<NotificationChannelGroup>()
 
     /**
-     * Give the controller all of the information it needs to present the dialog
+     * Give the controller all the information it needs to present the dialog
      * for a given app. Does a bunch of querying of NoMan, but won't present anything yet
      */
     fun prepareDialogForApp(
         appName: String,
         packageName: String,
         uid: Int,
-        channels: Set<NotificationChannel>,
+        channel: NotificationChannel,
         appIcon: Drawable,
         onSettingsClickListener: NotificationInfo.OnSettingsClickListener?
     ) {
@@ -110,6 +110,7 @@
         this.appIcon = appIcon
         this.appNotificationsEnabled = checkAreAppNotificationsOn()
         this.onSettingsClickListener = onSettingsClickListener
+        this.channel = channel
 
         // These will always start out the same
         appNotificationsCurrentlyEnabled = appNotificationsEnabled
@@ -117,9 +118,7 @@
         channelGroupList.clear()
         channelGroupList.addAll(fetchNotificationChannelGroups())
         buildGroupNameLookup()
-        providedChannels.clear()
-        providedChannels.addAll(channels)
-        padToFourChannels(channels)
+        populateChannelList()
         initDialog()
 
         prepared = true
@@ -133,36 +132,26 @@
         }
     }
 
-    private fun padToFourChannels(channels: Set<NotificationChannel>) {
-        paddedChannels.clear()
-        // First, add all of the given channels
-        paddedChannels.addAll(channels.asSequence().take(4))
-
-        // Then pad to 4 if we haven't been given that many
-        paddedChannels.addAll(getDisplayableChannels(channelGroupList.asSequence())
-                .filterNot { paddedChannels.contains(it) }
-                .distinct()
-                .take(4 - paddedChannels.size))
-
-        // If we only got one channel and it has the default miscellaneous tag, then we actually
-        // are looking at an app with a targetSdk <= O, and it doesn't make much sense to show the
-        // channel
-        if (paddedChannels.size == 1 && DEFAULT_CHANNEL_ID == paddedChannels[0].id) {
-            paddedChannels.clear()
+    private fun populateChannelList() {
+        channelList.clear()
+        if (DEFAULT_CHANNEL_ID != channel!!.id) {
+            channelList.add(0, channel!!)
+            channelList.addAll(getDisplayableChannels(channelGroupList.asSequence())
+                    .filterNot { it.id == channel!!.id }
+                    .distinct())
         }
     }
 
     private fun getDisplayableChannels(
         groupList: Sequence<NotificationChannelGroup>
     ): Sequence<NotificationChannel> {
-
-        // TODO (b/194833441): remove channel level settings when we move to a permission
         val channels = groupList
                 .flatMap { group ->
-                    group.channels.asSequence().filterNot { channel ->
-                        channel.importance == IMPORTANCE_NONE ||
+                    group.channels.asSequence()
+                            .sortedWith(compareBy {group.name?.toString() ?: group.id})
+                            .filterNot { channel ->
                                 channel.isImportanceLockedByCriticalDeviceFunction
-                    }
+                            }
                 }
 
         // TODO: sort these by avgSentWeekly, but for now let's just do alphabetical (why not)
@@ -196,8 +185,7 @@
         appNotificationsCurrentlyEnabled = null
 
         edits.clear()
-        paddedChannels.clear()
-        providedChannels.clear()
+        channelList.clear()
         groupNameLookup.clear()
     }
 
@@ -231,7 +219,7 @@
     @Suppress("unchecked_cast")
     private fun fetchNotificationChannelGroups(): List<NotificationChannelGroup> {
         return try {
-            noMan.getNotificationChannelGroupsForPackage(packageName!!, appUid!!, false)
+            noMan.getRecentBlockedNotificationChannelGroupsForPackage(packageName!!, appUid!!)
                     .list as? List<NotificationChannelGroup> ?: listOf()
         } catch (e: Exception) {
             Log.e(TAG, "Error fetching channel groups", e)
@@ -280,7 +268,6 @@
 
     @VisibleForTesting
     fun launchSettings(sender: View) {
-        val channel = if (providedChannels.size == 1) providedChannels[0] else null
         onSettingsClickListener?.onClick(sender, channel, appUid!!)
     }
 
@@ -301,14 +288,12 @@
                 controller = this@ChannelEditorDialogController
                 appIcon = this@ChannelEditorDialogController.appIcon
                 appName = this@ChannelEditorDialogController.appName
-                channels = paddedChannels
+                channels = channelList
             }
 
             setOnShowListener {
-                // play a highlight animation for the given channels
-                for (channel in providedChannels) {
-                    listView?.highlightChannel(channel)
-                }
+                // play a highlight animation for the given channel
+                listView?.highlightChannel(channel!!)
             }
 
             findViewById<TextView>(R.id.done_button)?.setOnClickListener {
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ChannelEditorListView.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ChannelEditorListView.kt
index 2cfd075..10e67a4 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ChannelEditorListView.kt
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ChannelEditorListView.kt
@@ -20,6 +20,7 @@
 import android.animation.ValueAnimator
 import android.app.NotificationChannel
 import android.app.NotificationManager.IMPORTANCE_DEFAULT
+import android.app.NotificationManager.IMPORTANCE_LOW
 import android.app.NotificationManager.IMPORTANCE_NONE
 import android.app.NotificationManager.IMPORTANCE_UNSPECIFIED
 import android.content.Context
@@ -55,12 +56,14 @@
 
     // The first row is for the entire app
     private lateinit var appControlRow: AppControlView
+    private lateinit var channelListView: LinearLayout
     private val channelRows = mutableListOf<ChannelRow>()
 
     override fun onFinishInflate() {
         super.onFinishInflate()
 
         appControlRow = requireViewById(R.id.app_control)
+        channelListView = requireViewById(R.id.scrollView)
     }
 
     /**
@@ -102,7 +105,7 @@
 
         // Remove any rows
         for (row in channelRows) {
-            removeView(row)
+            channelListView.removeView(row)
         }
         channelRows.clear()
 
@@ -122,7 +125,7 @@
         row.channel = channel
 
         channelRows.add(row)
-        addView(row)
+        channelListView.addView(row)
     }
 
     private fun updateAppControlRow(enabled: Boolean) {
@@ -179,7 +182,9 @@
         switch = requireViewById(R.id.toggle)
         switch.setOnCheckedChangeListener { _, b ->
             channel?.let {
-                controller.proposeEditForChannel(it, if (b) it.importance else IMPORTANCE_NONE)
+                controller.proposeEditForChannel(it,
+                        if (b) it.originalImportance.coerceAtLeast(IMPORTANCE_LOW)
+                        else IMPORTANCE_NONE)
             }
         }
         setOnClickListener { switch.toggle() }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableNotificationRow.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableNotificationRow.java
index fb8024c..d18f991 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableNotificationRow.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/ExpandableNotificationRow.java
@@ -2658,42 +2658,6 @@
     }
 
     /**
-     * Returns the number of channels covered by the notification row (including its children if
-     * it's a summary notification).
-     */
-    public int getNumUniqueChannels() {
-        return getUniqueChannels().size();
-    }
-
-    /**
-     * Returns the channels covered by the notification row (including its children if
-     * it's a summary notification).
-     */
-    public ArraySet<NotificationChannel> getUniqueChannels() {
-        ArraySet<NotificationChannel> channels = new ArraySet<>();
-
-        channels.add(mEntry.getChannel());
-
-        // If this is a summary, then add in the children notification channels for the
-        // same user and pkg.
-        if (mIsSummaryWithChildren) {
-            final List<ExpandableNotificationRow> childrenRows = getAttachedChildren();
-            final int numChildren = childrenRows.size();
-            for (int i = 0; i < numChildren; i++) {
-                final ExpandableNotificationRow childRow = childrenRows.get(i);
-                final NotificationChannel childChannel = childRow.getEntry().getChannel();
-                final StatusBarNotification childSbn = childRow.getEntry().getSbn();
-                if (childSbn.getUser().equals(mEntry.getSbn().getUser())
-                        && childSbn.getPackageName().equals(mEntry.getSbn().getPackageName())) {
-                    channels.add(childChannel);
-                }
-            }
-        }
-
-        return channels;
-    }
-
-    /**
      * If this is a group, update the appearance of the children.
      */
     public void updateChildrenAppearance() {
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/NotificationGutsManager.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/NotificationGutsManager.java
index 1dd3739..6d656605 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/NotificationGutsManager.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/NotificationGutsManager.java
@@ -403,7 +403,6 @@
                 mChannelEditorDialogController,
                 packageName,
                 row.getEntry().getChannel(),
-                row.getUniqueChannels(),
                 row.getEntry(),
                 onSettingsClick,
                 onAppSettingsClick,
@@ -449,7 +448,6 @@
                 mChannelEditorDialogController,
                 packageName,
                 row.getEntry().getChannel(),
-                row.getUniqueChannels(),
                 row.getEntry(),
                 onSettingsClick,
                 mDeviceProvisionedController.isDeviceProvisioned(),
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/NotificationInfo.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/NotificationInfo.java
index d8f31d4..d8ebd42 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/NotificationInfo.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/NotificationInfo.java
@@ -104,8 +104,6 @@
     private String mAppName;
     private int mAppUid;
     private String mDelegatePkg;
-    private int mNumUniqueChannelsInRow;
-    private Set<NotificationChannel> mUniqueChannelsInRow;
     private NotificationChannel mSingleNotificationChannel;
     private int mStartingChannelImportance;
     private boolean mWasShownHighPriority;
@@ -196,7 +194,6 @@
             ChannelEditorDialogController channelEditorDialogController,
             String pkg,
             NotificationChannel notificationChannel,
-            Set<NotificationChannel> uniqueChannelsInRow,
             NotificationEntry entry,
             OnSettingsClickListener onSettingsClick,
             OnAppSettingsClickListener onAppSettingsClick,
@@ -213,8 +210,6 @@
         mChannelEditorDialogController = channelEditorDialogController;
         mAssistantFeedbackController = assistantFeedbackController;
         mPackageName = pkg;
-        mUniqueChannelsInRow = uniqueChannelsInRow;
-        mNumUniqueChannelsInRow = uniqueChannelsInRow.size();
         mEntry = entry;
         mSbn = entry.getSbn();
         mPm = pm;
@@ -236,15 +231,8 @@
 
         int numTotalChannels = mINotificationManager.getNumNotificationChannelsForPackage(
                 pkg, mAppUid, false /* includeDeleted */);
-        if (mNumUniqueChannelsInRow == 0) {
-            throw new IllegalArgumentException("bindNotification requires at least one channel");
-        } else  {
-            // Special behavior for the Default channel if no other channels have been defined.
-            mIsSingleDefaultChannel = mNumUniqueChannelsInRow == 1
-                    && mSingleNotificationChannel.getId().equals(
-                            NotificationChannel.DEFAULT_CHANNEL_ID)
-                    && numTotalChannels == 1;
-        }
+        mIsSingleDefaultChannel = mSingleNotificationChannel.getId().equals(
+                NotificationChannel.DEFAULT_CHANNEL_ID) && numTotalChannels == 1;
         mIsAutomaticChosen = getAlertingBehavior() == BEHAVIOR_AUTOMATIC;
 
         bindHeader();
@@ -271,11 +259,6 @@
             findViewById(R.id.interruptiveness_settings).setVisibility(GONE);
             ((TextView) findViewById(R.id.done)).setText(R.string.inline_done_button);
             findViewById(R.id.turn_off_notifications).setVisibility(GONE);
-        } else if (mNumUniqueChannelsInRow > 1) {
-            findViewById(R.id.non_configurable_call_text).setVisibility(GONE);
-            findViewById(R.id.non_configurable_text).setVisibility(GONE);
-            findViewById(R.id.interruptiveness_settings).setVisibility(GONE);
-            findViewById(R.id.non_configurable_multichannel_text).setVisibility(VISIBLE);
         } else {
             findViewById(R.id.non_configurable_call_text).setVisibility(GONE);
             findViewById(R.id.non_configurable_text).setVisibility(GONE);
@@ -361,9 +344,7 @@
         if (mAppUid >= 0 && mOnSettingsClickListener != null && mIsDeviceProvisioned) {
             final int appUidF = mAppUid;
             return ((View view) -> {
-                mOnSettingsClickListener.onClick(view,
-                        mNumUniqueChannelsInRow > 1 ? null : mSingleNotificationChannel,
-                        appUidF);
+                mOnSettingsClickListener.onClick(view, mSingleNotificationChannel, appUidF);
             });
         }
         return null;
@@ -375,7 +356,7 @@
                 mPresentingChannelEditorDialog = true;
 
                 mChannelEditorDialogController.prepareDialogForApp(mAppName, mPackageName, mAppUid,
-                        mUniqueChannelsInRow, mPkgIcon, mOnSettingsClickListener);
+                        mSingleNotificationChannel, mPkgIcon, mOnSettingsClickListener);
                 mChannelEditorDialogController.setOnFinishListener(() -> {
                     mPresentingChannelEditorDialog = false;
                     mGutsContainer.closeControls(this, false);
@@ -392,7 +373,7 @@
 
     private void bindName() {
         final TextView channelName = findViewById(R.id.channel_name);
-        if (mIsSingleDefaultChannel || mNumUniqueChannelsInRow > 1) {
+        if (mIsSingleDefaultChannel) {
             channelName.setVisibility(View.GONE);
         } else {
             channelName.setText(mSingleNotificationChannel.getName());
@@ -459,7 +440,7 @@
             Handler bgHandler = new Handler(Dependency.get(Dependency.BG_LOOPER));
             bgHandler.post(
                     new UpdateImportanceRunnable(mINotificationManager, mPackageName, mAppUid,
-                            mNumUniqueChannelsInRow == 1 ? mSingleNotificationChannel : null,
+                            mSingleNotificationChannel,
                             mStartingChannelImportance, newImportance, mIsAutomaticChosen));
             mOnUserInteractionCallback.onImportanceChanged(mEntry);
         }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/PartialConversationInfo.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/PartialConversationInfo.java
index 06c3b79..53f7d4b 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/PartialConversationInfo.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/PartialConversationInfo.java
@@ -57,7 +57,6 @@
     private StatusBarNotification mSbn;
     private boolean mIsDeviceProvisioned;
     private boolean mIsNonBlockable;
-    private Set<NotificationChannel> mUniqueChannelsInRow;
     private Drawable mPkgIcon;
 
     private boolean mPresentingChannelEditorDialog = false;
@@ -83,7 +82,6 @@
             ChannelEditorDialogController channelEditorDialogController,
             String pkg,
             NotificationChannel notificationChannel,
-            Set<NotificationChannel> uniqueChannelsInRow,
             NotificationEntry entry,
             NotificationInfo.OnSettingsClickListener onSettingsClick,
             boolean isDeviceProvisioned,
@@ -100,7 +98,6 @@
         mIsDeviceProvisioned = isDeviceProvisioned;
         mIsNonBlockable = isNonBlockable;
         mChannelEditorDialogController = channelEditorDialogController;
-        mUniqueChannelsInRow = uniqueChannelsInRow;
 
         bindHeader();
         bindActions();
@@ -149,7 +146,7 @@
                 mPresentingChannelEditorDialog = true;
 
                 mChannelEditorDialogController.prepareDialogForApp(mAppName, mPackageName, mAppUid,
-                        mUniqueChannelsInRow, mPkgIcon, mOnSettingsClickListener);
+                        mNotificationChannel, mPkgIcon, mOnSettingsClickListener);
                 mChannelEditorDialogController.setOnFinishListener(() -> {
                     mPresentingChannelEditorDialog = false;
                     mGutsContainer.closeControls(this, false);
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/row/ChannelEditorDialogControllerTest.kt b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/row/ChannelEditorDialogControllerTest.kt
index 64d0256..7dcbd80 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/row/ChannelEditorDialogControllerTest.kt
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/row/ChannelEditorDialogControllerTest.kt
@@ -73,14 +73,14 @@
         controller = ChannelEditorDialogController(mContext, mockNoMan, dialogBuilder)
 
         channel1 = NotificationChannel(TEST_CHANNEL, TEST_CHANNEL_NAME, IMPORTANCE_DEFAULT)
-        channel2 = NotificationChannel(TEST_CHANNEL2, TEST_CHANNEL_NAME2, IMPORTANCE_DEFAULT)
+        channel2 = NotificationChannel(TEST_CHANNEL2, TEST_CHANNEL_NAME2, IMPORTANCE_NONE)
         channelDefault = NotificationChannel(
                 NotificationChannel.DEFAULT_CHANNEL_ID, TEST_CHANNEL_NAME, IMPORTANCE_DEFAULT)
 
         group = NotificationChannelGroup(TEST_GROUP_ID, TEST_GROUP_NAME)
 
-        `when`(mockNoMan.getNotificationChannelGroupsForPackage(
-                eq(TEST_PACKAGE_NAME), eq(TEST_UID), anyBoolean()))
+        `when`(mockNoMan.getRecentBlockedNotificationChannelGroupsForPackage(
+                eq(TEST_PACKAGE_NAME), eq(TEST_UID)))
                 .thenReturn(ParceledListSlice(listOf(group)))
 
         `when`(mockNoMan.areNotificationsEnabledForPackage(eq(TEST_PACKAGE_NAME), eq(TEST_UID)))
@@ -89,11 +89,13 @@
 
     @Test
     fun testPrepareDialogForApp_noExtraChannels() {
+        channel1.group = group.id
+        channel2.group = group.id
         group.channels = listOf(channel1, channel2)
         controller.prepareDialogForApp(TEST_APP_NAME, TEST_PACKAGE_NAME, TEST_UID,
-                setOf(channel1, channel2), appIcon, clickListener)
+                channel1, appIcon, clickListener)
 
-        assertEquals(2, controller.paddedChannels.size)
+        assertEquals(2, controller.channelList.size)
     }
 
     @Test
@@ -101,39 +103,41 @@
         group.addChannel(channelDefault)
 
         controller.prepareDialogForApp(TEST_APP_NAME, TEST_PACKAGE_NAME, TEST_UID,
-                setOf(channelDefault), appIcon, clickListener)
+                channelDefault, appIcon, clickListener)
 
         assertEquals("No channels should be shown when there is only the miscellaneous channel",
-                0, controller.paddedChannels.size)
+                0, controller.channelList.size)
     }
 
     @Test
-    fun testPrepareDialogForApp_noProvidedChannels_noException() {
-        group.channels = listOf()
-
-        controller.prepareDialogForApp(TEST_APP_NAME, TEST_PACKAGE_NAME, TEST_UID,
-                setOf(), appIcon, clickListener)
-    }
-
-    @Test
-    fun testPrepareDialogForApp_retrievesUpTo4Channels() {
+    fun testPrepareDialogForApp_AddsAllChannelsAllGroups() {
+        val group2 = NotificationChannelGroup("two", "group two")
         val channel3 = NotificationChannel("test_channel_3", "Test channel 3", IMPORTANCE_DEFAULT)
+        channel3.group = group2.id
         val channel4 = NotificationChannel("test_channel_4", "Test channel 4", IMPORTANCE_DEFAULT)
+        channel4.group = group.id
+        val channel5 = NotificationChannel("test_channel_5", "Test channel 5", IMPORTANCE_DEFAULT)
+        channel5.group = group.id
 
-        group.channels = listOf(channel1, channel2, channel3, channel4)
+        `when`(mockNoMan.getRecentBlockedNotificationChannelGroupsForPackage(
+                eq(TEST_PACKAGE_NAME), eq(TEST_UID)))
+                .thenReturn(ParceledListSlice(listOf(group, group2)))
+
+        group.channels = listOf(channel1, channel2, channel4, channel5)
+        group2.channels = listOf(channel3)
 
         controller.prepareDialogForApp(TEST_APP_NAME, TEST_PACKAGE_NAME, TEST_UID,
-                setOf(channel1), appIcon, clickListener)
+                channel1, appIcon, clickListener)
 
-        assertEquals("ChannelEditorDialog should fetch enough channels to show 4",
-                4, controller.paddedChannels.size)
+        assertEquals("ChannelEditorDialog should show all channels",
+                5, controller.channelList.size)
     }
 
     @Test
     fun testApply_demoteChannel() {
         group.channels = listOf(channel1, channel2)
         controller.prepareDialogForApp(TEST_APP_NAME, TEST_PACKAGE_NAME, TEST_UID,
-                setOf(channel1, channel2), appIcon, clickListener)
+                channel1, appIcon, clickListener)
 
         // propose an adjustment of channel1
         controller.proposeEditForChannel(channel1, IMPORTANCE_NONE)
@@ -145,14 +149,33 @@
 
         // Channel 2 shouldn't have changed
         assertEquals("Proposed edits should take effect after apply",
+                IMPORTANCE_NONE, channel2.importance)
+    }
+
+    @Test
+    fun testApply_promoteChannel() {
+        group.channels = listOf(channel1, channel2)
+        controller.prepareDialogForApp(TEST_APP_NAME, TEST_PACKAGE_NAME, TEST_UID,
+                channel1, appIcon, clickListener)
+
+        // propose an adjustment of channel1
+        controller.proposeEditForChannel(channel2, IMPORTANCE_DEFAULT)
+
+        controller.apply()
+
+        assertEquals("Proposed edits should take effect after apply",
                 IMPORTANCE_DEFAULT, channel2.importance)
+
+        // Channel 1 shouldn't have changed
+        assertEquals("Proposed edits should take effect after apply",
+                IMPORTANCE_DEFAULT, channel1.importance)
     }
 
     @Test
     fun testApply_demoteApp() {
         group.channels = listOf(channel1, channel2)
         controller.prepareDialogForApp(TEST_APP_NAME, TEST_PACKAGE_NAME, TEST_UID,
-                setOf(channel1, channel2), appIcon, clickListener)
+                channel1, appIcon, clickListener)
 
         controller.proposeSetAppNotificationsEnabled(false)
         controller.apply()
@@ -168,7 +191,7 @@
                 .thenReturn(false)
 
         controller.prepareDialogForApp(TEST_APP_NAME, TEST_PACKAGE_NAME, TEST_UID,
-                setOf(channel1, channel2), appIcon, clickListener)
+                channel1, appIcon, clickListener)
         controller.proposeSetAppNotificationsEnabled(true)
         controller.apply()
 
@@ -181,7 +204,7 @@
         // GIVEN editor dialog
         group.channels = listOf(channel1, channel2)
         controller.prepareDialogForApp(TEST_APP_NAME, TEST_PACKAGE_NAME, TEST_UID,
-                setOf(channel1, channel2), appIcon, null)
+                channel1, appIcon, null)
 
         // WHEN user taps settings
         // Pass in any old view, it should never actually be used
@@ -197,7 +220,7 @@
 
         group.channels = listOf(channel1, channel2)
         controller.prepareDialogForApp(TEST_APP_NAME, TEST_PACKAGE_NAME, TEST_UID,
-                setOf(channel1, channel2), appIcon, null)
+                channel1, appIcon, null)
 
         // WHEN the user proposes a change
         controller.proposeEditForChannel(channel1, IMPORTANCE_NONE)
@@ -214,7 +237,7 @@
 
         group.channels = listOf(channel1, channel2)
         controller.prepareDialogForApp(TEST_APP_NAME, TEST_PACKAGE_NAME, TEST_UID,
-                setOf(channel1, channel2), appIcon, null)
+                channel1, appIcon, null)
 
         // WHEN the user proposes a change
         controller.proposeEditForChannel(channel1, IMPORTANCE_NONE)
@@ -236,7 +259,6 @@
         const val TEST_PACKAGE_NAME = "test_package"
         const val TEST_SYSTEM_PACKAGE_NAME = PRINT_SPOOLER_PACKAGE_NAME
         const val TEST_UID = 1
-        const val MULTIPLE_CHANNEL_COUNT = 2
         const val TEST_CHANNEL = "test_channel"
         const val TEST_CHANNEL_NAME = "Test Channel Name"
         const val TEST_CHANNEL2 = "test_channel2"
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/row/ExpandableNotificationRowTest.java b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/row/ExpandableNotificationRowTest.java
index ac8b42a..e373143 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/row/ExpandableNotificationRowTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/row/ExpandableNotificationRowTest.java
@@ -481,33 +481,6 @@
     }
 
     @Test
-    public void testGetNumUniqueChildren_defaultChannel() throws Exception {
-        ExpandableNotificationRow groupRow = mNotificationTestHelper.createGroup();
-
-        assertEquals(1, groupRow.getNumUniqueChannels());
-    }
-
-    @Test
-    public void testGetNumUniqueChildren_multiChannel() throws Exception {
-        ExpandableNotificationRow group = mNotificationTestHelper.createGroup();
-
-        List<ExpandableNotificationRow> childRows =
-                group.getChildrenContainer().getAttachedChildren();
-        // Give each child a unique channel id/name.
-        int i = 0;
-        for (ExpandableNotificationRow childRow : childRows) {
-            modifyRanking(childRow.getEntry())
-                    .setChannel(
-                            new NotificationChannel(
-                                    "id" + i, "dinnertime" + i, IMPORTANCE_DEFAULT))
-                    .build();
-            i++;
-        }
-
-        assertEquals(3, group.getNumUniqueChannels());
-    }
-
-    @Test
     public void testIconScrollXAfterTranslationAndReset() throws Exception {
         ExpandableNotificationRow group = mNotificationTestHelper.createGroup();
 
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/row/NotificationGutsManagerTest.java b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/row/NotificationGutsManagerTest.java
index 9e0f83c..0f1e63f 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/row/NotificationGutsManagerTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/row/NotificationGutsManagerTest.java
@@ -462,7 +462,6 @@
                 eq(mChannelEditorDialogController),
                 eq(statusBarNotification.getPackageName()),
                 any(NotificationChannel.class),
-                anySet(),
                 eq(entry),
                 any(NotificationInfo.OnSettingsClickListener.class),
                 any(NotificationInfo.OnAppSettingsClickListener.class),
@@ -496,7 +495,6 @@
                 eq(mChannelEditorDialogController),
                 eq(statusBarNotification.getPackageName()),
                 any(NotificationChannel.class),
-                anySet(),
                 eq(entry),
                 any(NotificationInfo.OnSettingsClickListener.class),
                 any(NotificationInfo.OnAppSettingsClickListener.class),
@@ -528,7 +526,6 @@
                 eq(mChannelEditorDialogController),
                 eq(statusBarNotification.getPackageName()),
                 any(NotificationChannel.class),
-                anySet(),
                 eq(entry),
                 any(NotificationInfo.OnSettingsClickListener.class),
                 any(NotificationInfo.OnAppSettingsClickListener.class),
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/row/NotificationInfoTest.java b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/row/NotificationInfoTest.java
index f0b4dd4..b59385c 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/row/NotificationInfoTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/row/NotificationInfoTest.java
@@ -92,7 +92,6 @@
     private static final String TEST_PACKAGE_NAME = "test_package";
     private static final String TEST_SYSTEM_PACKAGE_NAME = PRINT_SPOOLER_PACKAGE_NAME;
     private static final int TEST_UID = 1;
-    private static final int MULTIPLE_CHANNEL_COUNT = 2;
     private static final String TEST_CHANNEL = "test_channel";
     private static final String TEST_CHANNEL_NAME = "TEST CHANNEL NAME";
 
@@ -100,8 +99,6 @@
     private NotificationInfo mNotificationInfo;
     private NotificationChannel mNotificationChannel;
     private NotificationChannel mDefaultNotificationChannel;
-    private Set<NotificationChannel> mNotificationChannelSet = new HashSet<>();
-    private Set<NotificationChannel> mDefaultNotificationChannelSet = new HashSet<>();
     private StatusBarNotification mSbn;
     private NotificationEntry mEntry;
     private UiEventLoggerFake mUiEventLogger = new UiEventLoggerFake();
@@ -162,11 +159,9 @@
         // Some test channels.
         mNotificationChannel = new NotificationChannel(
                 TEST_CHANNEL, TEST_CHANNEL_NAME, IMPORTANCE_LOW);
-        mNotificationChannelSet.add(mNotificationChannel);
         mDefaultNotificationChannel = new NotificationChannel(
                 NotificationChannel.DEFAULT_CHANNEL_ID, TEST_CHANNEL_NAME,
                 IMPORTANCE_LOW);
-        mDefaultNotificationChannelSet.add(mDefaultNotificationChannel);
         mSbn = new StatusBarNotification(TEST_PACKAGE_NAME, TEST_PACKAGE_NAME, 0, null, TEST_UID, 0,
                 new Notification(), UserHandle.getUserHandleForUid(TEST_UID), null, 0);
         mEntry = new NotificationEntryBuilder().setSbn(mSbn).build();
@@ -185,7 +180,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -212,7 +206,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -235,7 +228,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -267,7 +259,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 entry,
                 null,
                 null,
@@ -291,7 +282,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -320,7 +310,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -344,7 +333,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -367,7 +355,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mDefaultNotificationChannel,
-                mDefaultNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -394,7 +381,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mDefaultNotificationChannel,
-                mDefaultNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -417,7 +403,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -441,7 +426,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 (View v, NotificationChannel c, int appUid) -> {
                     assertEquals(mNotificationChannel, c);
@@ -470,7 +454,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -494,7 +477,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 (View v, NotificationChannel c, int appUid) -> {
                     assertEquals(mNotificationChannel, c);
@@ -519,7 +501,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -536,7 +517,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 (View v, NotificationChannel c, int appUid) -> { },
                 null,
@@ -551,86 +531,6 @@
     }
 
     @Test
-    public void testOnClickListenerPassesNullChannelForBundle() throws Exception {
-        final CountDownLatch latch = new CountDownLatch(1);
-        mNotificationInfo.bindNotification(
-                mMockPackageManager,
-                mMockINotificationManager,
-                mOnUserInteractionCallback,
-                mChannelEditorDialogController,
-                TEST_PACKAGE_NAME, mNotificationChannel,
-                createMultipleChannelSet(MULTIPLE_CHANNEL_COUNT),
-                mEntry,
-                (View v, NotificationChannel c, int appUid) -> {
-                    assertEquals(null, c);
-                    latch.countDown();
-                },
-                null,
-                mUiEventLogger,
-                true,
-                true,
-                true,
-                mAssistantFeedbackController,
-                mMetricsLogger);
-
-        mNotificationInfo.findViewById(R.id.info).performClick();
-        // Verify that listener was triggered.
-        assertEquals(0, latch.getCount());
-    }
-
-    @Test
-    @UiThreadTest
-    public void testBindNotification_ChannelNameInvisibleWhenBundleFromDifferentChannels()
-            throws Exception {
-        mNotificationInfo.bindNotification(
-                mMockPackageManager,
-                mMockINotificationManager,
-                mOnUserInteractionCallback,
-                mChannelEditorDialogController,
-                TEST_PACKAGE_NAME,
-                mNotificationChannel,
-                createMultipleChannelSet(MULTIPLE_CHANNEL_COUNT),
-                mEntry,
-                null,
-                null,
-                mUiEventLogger,
-                true,
-                false,
-                true,
-                mAssistantFeedbackController,
-                mMetricsLogger);
-        final TextView channelNameView =
-                mNotificationInfo.findViewById(R.id.channel_name);
-        assertEquals(GONE, channelNameView.getVisibility());
-    }
-
-    @Test
-    @UiThreadTest
-    public void testStopInvisibleIfBundleFromDifferentChannels() throws Exception {
-        mNotificationInfo.bindNotification(
-                mMockPackageManager,
-                mMockINotificationManager,
-                mOnUserInteractionCallback,
-                mChannelEditorDialogController,
-                TEST_PACKAGE_NAME,
-                mNotificationChannel,
-                createMultipleChannelSet(MULTIPLE_CHANNEL_COUNT),
-                mEntry,
-                null,
-                null,
-                mUiEventLogger,
-                true,
-                false,
-                true,
-                mAssistantFeedbackController,
-                mMetricsLogger);
-        assertEquals(GONE, mNotificationInfo.findViewById(
-                R.id.interruptiveness_settings).getVisibility());
-        assertEquals(VISIBLE, mNotificationInfo.findViewById(
-                R.id.non_configurable_multichannel_text).getVisibility());
-    }
-
-    @Test
     public void testBindNotification_whenAppUnblockable() throws Exception {
         mNotificationInfo.bindNotification(
                 mMockPackageManager,
@@ -639,7 +539,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -683,7 +582,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -727,7 +625,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -755,7 +652,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -778,7 +674,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -803,7 +698,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -825,7 +719,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -847,7 +740,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -869,7 +761,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -893,7 +784,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -918,7 +808,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -946,7 +835,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -974,7 +862,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -1003,7 +890,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -1031,7 +917,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -1067,7 +952,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -1096,7 +980,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -1138,7 +1021,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -1176,7 +1058,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -1209,7 +1090,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -1246,7 +1126,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -1285,7 +1164,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -1317,7 +1195,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -1356,7 +1233,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -1386,7 +1262,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -1418,7 +1293,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -1454,7 +1328,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -1488,7 +1361,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -1522,7 +1394,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -1549,7 +1420,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 null,
@@ -1562,21 +1432,4 @@
 
         assertFalse(mNotificationInfo.willBeRemoved());
     }
-
-    private Set<NotificationChannel> createMultipleChannelSet(int howMany) {
-        Set<NotificationChannel> multiChannelSet = new HashSet<>();
-        for (int i = 0; i < howMany; i++) {
-            if (i == 0) {
-                multiChannelSet.add(mNotificationChannel);
-                continue;
-            }
-
-            NotificationChannel channel = new NotificationChannel(
-                    TEST_CHANNEL, TEST_CHANNEL_NAME + i, IMPORTANCE_LOW);
-
-            multiChannelSet.add(channel);
-        }
-
-        return multiChannelSet;
-    }
 }
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/row/PartialConversationInfoTest.java b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/row/PartialConversationInfoTest.java
index e42ce27..ccedd36 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/row/PartialConversationInfoTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/row/PartialConversationInfoTest.java
@@ -83,8 +83,6 @@
     private PartialConversationInfo mInfo;
     private NotificationChannel mNotificationChannel;
     private NotificationChannel mDefaultNotificationChannel;
-    private Set<NotificationChannel> mNotificationChannelSet = new HashSet<>();
-    private Set<NotificationChannel> mDefaultNotificationChannelSet = new HashSet<>();
     private StatusBarNotification mSbn;
     private NotificationEntry mEntry;
 
@@ -144,11 +142,9 @@
         // Some test channels.
         mNotificationChannel = new NotificationChannel(
                 TEST_CHANNEL, TEST_CHANNEL_NAME, IMPORTANCE_LOW);
-        mNotificationChannelSet.add(mNotificationChannel);
         mDefaultNotificationChannel = new NotificationChannel(
                 NotificationChannel.DEFAULT_CHANNEL_ID, TEST_CHANNEL_NAME,
                 IMPORTANCE_LOW);
-        mDefaultNotificationChannelSet.add(mDefaultNotificationChannel);
         Notification n = new Notification.Builder(mContext, mNotificationChannel.getId())
                 .setContentTitle(new SpannableString("title"))
                 .build();
@@ -166,7 +162,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 true,
@@ -185,7 +180,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 true,
@@ -202,7 +196,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 true,
@@ -228,7 +221,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 entry,
                 null,
                 true,
@@ -247,7 +239,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 (View v, NotificationChannel c, int appUid) -> {
                     assertEquals(mNotificationChannel, c);
@@ -271,7 +262,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 (View v, NotificationChannel c, int appUid) -> {
                     assertEquals(mNotificationChannel, c);
@@ -294,7 +284,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 true,
@@ -311,7 +300,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 (View v, NotificationChannel c, int appUid) -> {
                     assertEquals(mNotificationChannel, c);
@@ -330,7 +318,6 @@
                 mChannelEditorDialogController,
                 TEST_PACKAGE_NAME,
                 mNotificationChannel,
-                mNotificationChannelSet,
                 mEntry,
                 null,
                 true,
diff --git a/services/core/java/com/android/server/notification/NotificationManagerService.java b/services/core/java/com/android/server/notification/NotificationManagerService.java
index 802dfb1..a3c71c2 100755
--- a/services/core/java/com/android/server/notification/NotificationManagerService.java
+++ b/services/core/java/com/android/server/notification/NotificationManagerService.java
@@ -177,6 +177,7 @@
 import android.app.role.OnRoleHoldersChangedListener;
 import android.app.role.RoleManager;
 import android.app.usage.UsageEvents;
+import android.app.usage.UsageStatsManager;
 import android.app.usage.UsageStatsManagerInternal;
 import android.companion.ICompanionDeviceManager;
 import android.compat.annotation.ChangeId;
@@ -263,6 +264,7 @@
 import android.telephony.PhoneStateListener;
 import android.telephony.TelephonyManager;
 import android.text.TextUtils;
+import android.text.format.DateUtils;
 import android.util.ArrayMap;
 import android.util.ArraySet;
 import android.util.AtomicFile;
@@ -4159,7 +4161,7 @@
                 String pkg) {
             checkCallerIsSystemOrSameApp(pkg);
             return mPreferencesHelper.getNotificationChannelGroups(
-                    pkg, Binder.getCallingUid(), false, false, true);
+                    pkg, Binder.getCallingUid(), false, false, true, true, null);
         }
 
         @Override
@@ -4280,7 +4282,36 @@
                 String pkg, int uid, boolean includeDeleted) {
             enforceSystemOrSystemUI("getNotificationChannelGroupsForPackage");
             return mPreferencesHelper.getNotificationChannelGroups(
-                    pkg, uid, includeDeleted, true, false);
+                    pkg, uid, includeDeleted, true, false, true, null);
+        }
+
+        @Override
+        public ParceledListSlice<NotificationChannelGroup>
+                getRecentBlockedNotificationChannelGroupsForPackage(String pkg, int uid) {
+            enforceSystemOrSystemUI("getRecentBlockedNotificationChannelGroupsForPackage");
+            Set<String> recentlySentChannels = new HashSet<>();
+            long now = System.currentTimeMillis();
+            long startTime = now - (DateUtils.DAY_IN_MILLIS * 14);
+            UsageEvents events = mUsageStatsManagerInternal.queryEventsForUser(
+                UserHandle.getUserId(uid),  startTime, now, UsageEvents.SHOW_ALL_EVENT_DATA);
+            // get all channelids that sent notifs in the past 2 weeks
+            if (events != null) {
+                UsageEvents.Event event = new UsageEvents.Event();
+                while (events.hasNextEvent()) {
+                    events.getNextEvent(event);
+                    if (event.getEventType() == UsageEvents.Event.NOTIFICATION_INTERRUPTION) {
+                        if (pkg.equals(event.mPackage)) {
+                            String channelId = event.mNotificationChannelId;
+                            if (channelId != null) {
+                                recentlySentChannels.add(channelId);
+                            }
+                        }
+                    }
+                }
+            }
+
+            return mPreferencesHelper.getNotificationChannelGroups(
+                    pkg, uid, false, true, false, true, recentlySentChannels);
         }
 
         @Override
diff --git a/services/core/java/com/android/server/notification/PreferencesHelper.java b/services/core/java/com/android/server/notification/PreferencesHelper.java
index b132a23..de698d9 100644
--- a/services/core/java/com/android/server/notification/PreferencesHelper.java
+++ b/services/core/java/com/android/server/notification/PreferencesHelper.java
@@ -1459,9 +1459,9 @@
         }
     }
 
-    @Override
     public ParceledListSlice<NotificationChannelGroup> getNotificationChannelGroups(String pkg,
-            int uid, boolean includeDeleted, boolean includeNonGrouped, boolean includeEmpty) {
+            int uid, boolean includeDeleted, boolean includeNonGrouped, boolean includeEmpty,
+            boolean includeBlocked, Set<String> activeChannelFilter) {
         Objects.requireNonNull(pkg);
         Map<String, NotificationChannelGroup> groups = new ArrayMap<>();
         synchronized (mPackagePreferences) {
@@ -1473,7 +1473,11 @@
             int N = r.channels.size();
             for (int i = 0; i < N; i++) {
                 final NotificationChannel nc = r.channels.valueAt(i);
-                if (includeDeleted || !nc.isDeleted()) {
+                boolean includeChannel = (includeDeleted || !nc.isDeleted())
+                        && (activeChannelFilter == null
+                                || (includeBlocked && nc.getImportance() == IMPORTANCE_NONE)
+                                || activeChannelFilter.contains(nc.getId()));
+                if (includeChannel) {
                     if (nc.getGroup() != null) {
                         if (r.groups.get(nc.getGroup()) != null) {
                             NotificationChannelGroup ncg = groups.get(nc.getGroup());
@@ -1481,7 +1485,6 @@
                                 ncg = r.groups.get(nc.getGroup()).clone();
                                 ncg.setChannels(new ArrayList<>());
                                 groups.put(nc.getGroup(), ncg);
-
                             }
                             ncg.addChannel(nc);
                         }
diff --git a/services/core/java/com/android/server/notification/RankingConfig.java b/services/core/java/com/android/server/notification/RankingConfig.java
index fec3591..8df24c9 100644
--- a/services/core/java/com/android/server/notification/RankingConfig.java
+++ b/services/core/java/com/android/server/notification/RankingConfig.java
@@ -40,8 +40,6 @@
             int uid);
     void createNotificationChannelGroup(String pkg, int uid, NotificationChannelGroup group,
             boolean fromTargetApp, int callingUid, boolean isSystemOrSystemUi);
-    ParceledListSlice<NotificationChannelGroup> getNotificationChannelGroups(String pkg,
-            int uid, boolean includeDeleted, boolean includeNonGrouped, boolean includeEmpty);
     boolean createNotificationChannel(String pkg, int uid, NotificationChannel channel,
             boolean fromTargetApp, boolean hasDndAccess, int callingUid,
             boolean isSystemOrSystemUi);
diff --git a/services/tests/uiservicestests/src/com/android/server/notification/PreferencesHelperTest.java b/services/tests/uiservicestests/src/com/android/server/notification/PreferencesHelperTest.java
index 020afdb..8d7b5cb 100644
--- a/services/tests/uiservicestests/src/com/android/server/notification/PreferencesHelperTest.java
+++ b/services/tests/uiservicestests/src/com/android/server/notification/PreferencesHelperTest.java
@@ -141,6 +141,7 @@
 import com.android.server.notification.PermissionHelper.PackagePermission;
 
 import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
 import com.google.protobuf.InvalidProtocolBufferException;
 
 import org.json.JSONArray;
@@ -563,7 +564,7 @@
                 mHelper.getNotificationChannel(PKG_N_MR1, UID_N_MR1, channel2.getId(), false));
 
         List<NotificationChannelGroup> actualGroups = mHelper.getNotificationChannelGroups(
-                PKG_N_MR1, UID_N_MR1, false, true, false).getList();
+                PKG_N_MR1, UID_N_MR1, false, true, false, true, null).getList();
         boolean foundNcg = false;
         for (NotificationChannelGroup actual : actualGroups) {
             if (ncg.getId().equals(actual.getId())) {
@@ -647,7 +648,7 @@
                 mHelper.getNotificationChannel(PKG_N_MR1, UID_N_MR1, channel3.getId(), false));
 
         List<NotificationChannelGroup> actualGroups = mHelper.getNotificationChannelGroups(
-                PKG_N_MR1, UID_N_MR1, false, true, false).getList();
+                PKG_N_MR1, UID_N_MR1, false, true, false, true, null).getList();
         boolean foundNcg = false;
         for (NotificationChannelGroup actual : actualGroups) {
             if (ncg.getId().equals(actual.getId())) {
@@ -2620,6 +2621,16 @@
     }
 
     @Test
+    public void testOnlyHasDefaultChannel() throws Exception {
+        assertTrue(mHelper.onlyHasDefaultChannel(PKG_N_MR1, UID_N_MR1));
+        assertFalse(mHelper.onlyHasDefaultChannel(PKG_O, UID_O));
+
+        mHelper.createNotificationChannel(PKG_N_MR1, UID_N_MR1, getChannel(), true, false,
+                UID_N_MR1, false);
+        assertFalse(mHelper.onlyHasDefaultChannel(PKG_N_MR1, UID_N_MR1));
+    }
+
+    @Test
     public void testCreateDeletedChannel() throws Exception {
         long[] vibration = new long[]{100, 67, 145, 156};
         NotificationChannel channel =
@@ -2644,16 +2655,6 @@
     }
 
     @Test
-    public void testOnlyHasDefaultChannel() throws Exception {
-        assertTrue(mHelper.onlyHasDefaultChannel(PKG_N_MR1, UID_N_MR1));
-        assertFalse(mHelper.onlyHasDefaultChannel(PKG_O, UID_O));
-
-        mHelper.createNotificationChannel(PKG_N_MR1, UID_N_MR1, getChannel(), true, false,
-                UID_N_MR1, false);
-        assertFalse(mHelper.onlyHasDefaultChannel(PKG_N_MR1, UID_N_MR1));
-    }
-
-    @Test
     public void testCreateChannel_defaultChannelId() throws Exception {
         try {
             mHelper.createNotificationChannel(PKG_N_MR1, UID_N_MR1, new NotificationChannel(
@@ -2884,7 +2885,7 @@
                 UID_N_MR1});
 
         assertEquals(0, mHelper.getNotificationChannelGroups(
-                PKG_N_MR1, UID_N_MR1, true, true, false).getList().size());
+                PKG_N_MR1, UID_N_MR1, true, true, false, true, null).getList().size());
     }
 
     @Test
@@ -3022,7 +3023,7 @@
                 UID_N_MR1, false);
 
         List<NotificationChannelGroup> actual = mHelper.getNotificationChannelGroups(
-                PKG_N_MR1, UID_N_MR1, true, true, false).getList();
+                PKG_N_MR1, UID_N_MR1, true, true, false, true, null).getList();
         assertEquals(3, actual.size());
         for (NotificationChannelGroup group : actual) {
             if (group.getId() == null) {
@@ -3056,14 +3057,15 @@
         channel1.setGroup(ncg.getId());
         mHelper.createNotificationChannel(PKG_N_MR1, UID_N_MR1, channel1, true, false,
                 UID_N_MR1, false);
-        mHelper.getNotificationChannelGroups(PKG_N_MR1, UID_N_MR1, true, true, false).getList();
+        mHelper.getNotificationChannelGroups(PKG_N_MR1, UID_N_MR1, true, true, false, true, null)
+                .getList();
 
         channel1.setImportance(IMPORTANCE_LOW);
         mHelper.updateNotificationChannel(PKG_N_MR1, UID_N_MR1, channel1, true,
                 UID_N_MR1, false);
 
         List<NotificationChannelGroup> actual = mHelper.getNotificationChannelGroups(
-                PKG_N_MR1, UID_N_MR1, true, true, false).getList();
+                PKG_N_MR1, UID_N_MR1, true, true, false, true, null).getList();
 
         assertEquals(2, actual.size());
         for (NotificationChannelGroup group : actual) {
@@ -3089,7 +3091,7 @@
                 UID_N_MR1, false);
 
         List<NotificationChannelGroup> actual = mHelper.getNotificationChannelGroups(
-                PKG_N_MR1, UID_N_MR1, false, false, true).getList();
+                PKG_N_MR1, UID_N_MR1, false, false, true, true, null).getList();
 
         assertEquals(2, actual.size());
         for (NotificationChannelGroup group : actual) {
@@ -5786,6 +5788,62 @@
         assertFalse(isUserSet);
     }
 
+    @Test
+    public void testGetNotificationChannelGroups_withChannelFilter_includeBlocked() {
+        NotificationChannel channel =
+                new NotificationChannel("id2", "name1", NotificationManager.IMPORTANCE_HIGH);
+        mHelper.createNotificationChannel(PKG_N_MR1, UID_N_MR1, channel, true, false,
+                UID_N_MR1, false);
+        // modifying same object, don't need to call updateNotificationChannel
+        channel.setImportance(IMPORTANCE_NONE);
+
+        NotificationChannel channel2 =
+                new NotificationChannel("id2", "name2", NotificationManager.IMPORTANCE_HIGH);
+        mHelper.createNotificationChannel(PKG_N_MR1, UID_N_MR1, channel2, true, false,
+                UID_N_MR1, false);
+
+        NotificationChannel channel3 =
+                new NotificationChannel("id3", "name3", NotificationManager.IMPORTANCE_HIGH);
+        mHelper.createNotificationChannel(PKG_N_MR1, UID_N_MR1, channel3, true, false,
+                UID_N_MR1, false);
+
+        Set<String> filter = ImmutableSet.of("id3");
+
+        NotificationChannelGroup actual = mHelper.getNotificationChannelGroups(
+                PKG_N_MR1, UID_N_MR1, false, true, false, true, filter).getList().get(0);
+        assertEquals(2, actual.getChannels().size());
+        assertEquals(1, actual.getChannels().stream().filter(c -> c.getId().equals("id3")).count());
+        assertEquals(1, actual.getChannels().stream().filter(c -> c.getId().equals("id2")).count());
+    }
+
+    @Test
+    public void testGetNotificationChannelGroups_withChannelFilter_doNotIncludeBlocked() {
+        NotificationChannel channel =
+                new NotificationChannel("id2", "name1", NotificationManager.IMPORTANCE_HIGH);
+        mHelper.createNotificationChannel(PKG_N_MR1, UID_N_MR1, channel, true, false,
+                UID_N_MR1, false);
+        // modifying same object, don't need to call updateNotificationChannel
+        channel.setImportance(IMPORTANCE_NONE);
+
+        NotificationChannel channel2 =
+                new NotificationChannel("id2", "name2", NotificationManager.IMPORTANCE_HIGH);
+        mHelper.createNotificationChannel(PKG_N_MR1, UID_N_MR1, channel2, true, false,
+                UID_N_MR1, false);
+
+        NotificationChannel channel3 =
+                new NotificationChannel("id3", "name3", NotificationManager.IMPORTANCE_HIGH);
+        mHelper.createNotificationChannel(PKG_N_MR1, UID_N_MR1, channel3, true, false,
+                UID_N_MR1, false);
+
+        Set<String> filter = ImmutableSet.of("id3");
+
+        NotificationChannelGroup actual = mHelper.getNotificationChannelGroups(
+                PKG_N_MR1, UID_N_MR1, false, true, false, false, filter).getList().get(0);
+        assertEquals(1, actual.getChannels().size());
+        assertEquals(1, actual.getChannels().stream().filter(c -> c.getId().equals("id3")).count());
+        assertEquals(0, actual.getChannels().stream().filter(c -> c.getId().equals("id2")).count());
+    }
+
     private static NotificationChannel cloneChannel(NotificationChannel original) {
         Parcel parcel = Parcel.obtain();
         try {