[ENR] Ensure ENR views visibilities

This CL ensures public and private layouts of enr are not visible at the same time.

Bug: 361552380
Test: Presubmit
Flag: com.android.systemui.ensure_enr_views_visibility
Change-Id: Ic4dafffbc8933d717dbbf9884dc420523ba2c8e2
diff --git a/packages/SystemUI/aconfig/systemui.aconfig b/packages/SystemUI/aconfig/systemui.aconfig
index 426b24d..0b18110 100644
--- a/packages/SystemUI/aconfig/systemui.aconfig
+++ b/packages/SystemUI/aconfig/systemui.aconfig
@@ -1557,3 +1557,13 @@
     description: "Enables the tile detailed view UI."
     bug: "374173773"
 }
+
+flag {
+  name: "ensure_enr_views_visibility"
+  namespace: "systemui"
+  description: "Ensures public and private visibilities"
+  bug: "361552380"
+  metadata {
+    purpose: PURPOSE_BUGFIX
+  }
+}
\ No newline at end of file
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/EnsureEnrViewsVisibility.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/EnsureEnrViewsVisibility.kt
new file mode 100644
index 0000000..aa63f4ddb
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/row/EnsureEnrViewsVisibility.kt
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.systemui.statusbar.notification.row
+
+import com.android.systemui.Flags
+import com.android.systemui.flags.FlagToken
+import com.android.systemui.flags.RefactorFlagUtils
+
+/** Helper for reading or using the ensure enr views visibility flag state. */
+@Suppress("NOTHING_TO_INLINE")
+object EnsureEnrViewsVisibility {
+    /** The aconfig flag name */
+    const val FLAG_NAME = Flags.FLAG_ENSURE_ENR_VIEWS_VISIBILITY
+
+    /** A token used for dependency declaration */
+    val token: FlagToken
+        get() = FlagToken(FLAG_NAME, isEnabled)
+
+    /** Is the refactor enabled */
+    @JvmStatic
+    inline val isEnabled
+        get() = Flags.ensureEnrViewsVisibility()
+
+    /**
+     * Called to ensure code is only run when the flag is enabled. This protects users from the
+     * unintended behaviors caused by accidentally running new logic, while also crashing on an eng
+     * build to ensure that the refactor author catches issues in testing.
+     */
+    @JvmStatic
+    inline fun isUnexpectedlyInLegacyMode() =
+        RefactorFlagUtils.isUnexpectedlyInLegacyMode(isEnabled, FLAG_NAME)
+
+    /**
+     * Called to ensure code is only run when the flag is disabled. This will throw an exception if
+     * the flag is not enabled to ensure that the refactor author catches issues in testing.
+     * Caution!! Using this check incorrectly will cause crashes in nextfood builds!
+     */
+    @JvmStatic
+    inline fun assertInNewMode() = RefactorFlagUtils.assertInNewMode(isEnabled, FLAG_NAME)
+
+    /**
+     * Called to ensure code is only run when the flag is disabled. This will throw an exception if
+     * the flag is enabled to ensure that the refactor author catches issues in testing.
+     */
+    @JvmStatic
+    inline fun assertInLegacyMode() = RefactorFlagUtils.assertInLegacyMode(isEnabled, FLAG_NAME)
+}
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 933f793..a4c43a1 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
@@ -2507,6 +2507,10 @@
     }
 
     private void updateChildrenVisibility() {
+        if (EnsureEnrViewsVisibility.isEnabled()) {
+            mPublicLayout.setVisibility(mShowingPublic ? View.VISIBLE : View.INVISIBLE);
+        }
+
         boolean hideContentWhileLaunching = mExpandAnimationRunning && mGuts != null
                 && mGuts.isExposed();
         mPrivateLayout.setVisibility(!mShowingPublic && !mIsSummaryWithChildren
@@ -3073,7 +3077,13 @@
             } else {
                 mLogger.logSkipResetAllContentAlphas(getEntry());
             }
-            mPublicLayout.setVisibility(mShowingPublic ? View.VISIBLE : View.INVISIBLE);
+
+            if (!EnsureEnrViewsVisibility.isEnabled()) {
+                // mPublicLayout.setVisibility moved to updateChildrenVisibility when the flag is on
+                // in order to ensure public and private views are not visible
+                // together at the same time.
+                mPublicLayout.setVisibility(mShowingPublic ? View.VISIBLE : View.INVISIBLE);
+            }
             updateChildrenVisibility();
         } else {
             animateShowingPublic(delay, duration, mShowingPublic);