diff --git a/res/layout/confirm_convert_fbe.xml b/res/layout/confirm_convert_fbe.xml
deleted file mode 100644
index 537c368..0000000
--- a/res/layout/confirm_convert_fbe.xml
+++ /dev/null
@@ -1,46 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 2016 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.
--->
-
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:orientation="vertical"
-            android:layout_marginBottom="12dp" >
-
-        <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_marginStart="12dp"
-                android:layout_marginEnd="12dp"
-                android:layout_marginTop="12dp"
-                android:textSize="18sp"
-                android:text="@string/confirm_convert_to_fbe_warning" />
-
-        <LinearLayout
-                android:layout_width="wrap_content"
-                android:layout_height="fill_parent"
-                android:layout_gravity="center"
-                android:orientation="horizontal">
-            <Button
-                    android:id="@+id/button_confirm_convert_fbe"
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:layout_gravity="bottom"
-                    android:layout_marginBottom="12dp"
-                    android:text="@string/button_confirm_convert_fbe" />
-        </LinearLayout>
-
-</LinearLayout>
diff --git a/res/layout/convert_fbe.xml b/res/layout/convert_fbe.xml
deleted file mode 100644
index d1e0cea..0000000
--- a/res/layout/convert_fbe.xml
+++ /dev/null
@@ -1,46 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 2015 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.
--->
-
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-            android:layout_width="match_parent"
-            android:layout_height="match_parent"
-            android:orientation="vertical"
-            android:layout_marginBottom="12dp" >
-
-        <TextView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_marginStart="@dimen/preference_no_icon_padding_start"
-                android:layout_marginEnd="12dp"
-                android:layout_marginTop="12dp"
-                android:textSize="18sp"
-                android:text="@string/convert_to_fbe_warning" />
-
-        <LinearLayout
-                android:layout_width="wrap_content"
-                android:layout_height="fill_parent"
-                android:layout_gravity="center"
-                android:orientation="horizontal">
-            <Button
-                    android:id="@+id/button_convert_fbe"
-                    android:layout_width="wrap_content"
-                    android:layout_height="wrap_content"
-                    android:layout_gravity="bottom"
-                    android:layout_marginBottom="12dp"
-                    android:text="@string/button_convert_fbe" />
-        </LinearLayout>
-
-</LinearLayout>
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 5042302..0c3b8fd 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -11396,11 +11396,6 @@
     <!-- Title for the See more preference item in Special app access settings [CHAR LIMIT=30] -->
     <string name="special_access_more">See more</string>
 
-    <!-- Developer option to convert to file encryption - final warning -->
-    <string name="confirm_convert_to_fbe_warning">Really wipe user data and convert to file encryption?</string>
-    <!-- Developer option to convert to file encryption - final button -->
-    <string name="button_confirm_convert_fbe">Wipe and convert</string>
-
     <!-- Reset rate-limiting in the system service ShortcutManager.  "ShortcutManager" is the name of a system service and not translatable.
     If the word "rate-limit" is hard to translate, use "Reset ShortcutManager API call limit" as the source text, which means
     the same thing in this context.
diff --git a/res/xml/development_settings.xml b/res/xml/development_settings.xml
index cd37f4c..a0f0151 100644
--- a/res/xml/development_settings.xml
+++ b/res/xml/development_settings.xml
@@ -88,12 +88,6 @@
             android:summary="@string/runningservices_settings_summary"
             android:fragment="com.android.settings.applications.RunningServices" />
 
-        <Preference
-            android:key="convert_to_file_encryption"
-            android:title="@string/convert_to_file_encryption"
-            android:summary="@string/convert_to_file_encryption_enabled"
-            android:fragment="com.android.settings.applications.ConvertToFbe" />
-
         <com.android.settings.development.ColorModePreference
             android:key="picture_color_mode"
             android:title="@string/picture_color_mode"
diff --git a/src/com/android/settings/applications/ConfirmConvertToFbe.java b/src/com/android/settings/applications/ConfirmConvertToFbe.java
deleted file mode 100644
index 35ddc6b..0000000
--- a/src/com/android/settings/applications/ConfirmConvertToFbe.java
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * Copyright (C) 2016 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.settings.applications;
-
-import android.app.settings.SettingsEnums;
-import android.content.Intent;
-import android.os.Bundle;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.Button;
-
-import com.android.settings.R;
-import com.android.settings.SettingsPreferenceFragment;
-
-public class ConfirmConvertToFbe extends SettingsPreferenceFragment {
-    static final String TAG = "ConfirmConvertToFBE";
-
-    @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container,
-                Bundle savedInstanceState) {
-        View rootView = inflater.inflate(R.layout.confirm_convert_fbe, null);
-
-        final Button button = (Button) rootView.findViewById(R.id.button_confirm_convert_fbe);
-        button.setOnClickListener(new View.OnClickListener() {
-            public void onClick(View v) {
-                Intent intent = new Intent(Intent.ACTION_FACTORY_RESET);
-                intent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND);
-                intent.setPackage("android");
-                intent.putExtra(Intent.EXTRA_REASON, "convert_fbe");
-                getActivity().sendBroadcast(intent);
-            }
-        });
-
-        return rootView;
-    }
-
-    @Override
-    public int getMetricsCategory() {
-        return SettingsEnums.CONVERT_FBE_CONFIRM;
-    }
-}
diff --git a/src/com/android/settings/applications/ConvertToFbe.java b/src/com/android/settings/applications/ConvertToFbe.java
deleted file mode 100644
index d470011..0000000
--- a/src/com/android/settings/applications/ConvertToFbe.java
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * Copyright (C) 2015 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.settings.applications;
-
-import android.annotation.Nullable;
-import android.app.Activity;
-import android.app.settings.SettingsEnums;
-import android.content.Intent;
-import android.content.res.Resources;
-import android.os.Bundle;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.Button;
-
-import com.android.settings.R;
-import com.android.settings.core.InstrumentedFragment;
-import com.android.settings.core.SubSettingLauncher;
-import com.android.settings.password.ChooseLockSettingsHelper;
-
-/* Class to prompt for conversion of userdata to file based encryption
- */
-public class ConvertToFbe extends InstrumentedFragment {
-    static final String TAG = "ConvertToFBE";
-    private static final int KEYGUARD_REQUEST = 55;
-
-    private boolean runKeyguardConfirmation(int request) {
-        Resources res = getActivity().getResources();
-        final ChooseLockSettingsHelper.Builder builder =
-                new ChooseLockSettingsHelper.Builder(getActivity(), this);
-        return builder.setRequestCode(request)
-                .setTitle(res.getText(R.string.convert_to_file_encryption))
-                .show();
-    }
-
-    @Override
-    public void onCreate(@Nullable Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        getActivity().setTitle(R.string.convert_to_file_encryption);
-    }
-
-    @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container,
-            Bundle savedInstanceState) {
-        View rootView = inflater.inflate(R.layout.convert_fbe, null);
-
-        final Button button = rootView.findViewById(R.id.button_convert_fbe);
-        button.setOnClickListener(v -> {
-            if (!runKeyguardConfirmation(KEYGUARD_REQUEST)) {
-                convert();
-            }
-        });
-
-        return rootView;
-    }
-
-    @Override
-    public void onActivityResult(int requestCode, int resultCode, Intent data) {
-        super.onActivityResult(requestCode, resultCode, data);
-
-        if (requestCode != KEYGUARD_REQUEST) {
-            return;
-        }
-
-        // If the user entered a valid keyguard credential, start the conversion
-        // process
-        if (resultCode == Activity.RESULT_OK) {
-            convert();
-        }
-    }
-
-    private void convert() {
-        new SubSettingLauncher(getContext())
-                .setDestination(ConfirmConvertToFbe.class.getName())
-                .setTitleRes(R.string.convert_to_file_encryption)
-                .setSourceMetricsCategory(getMetricsCategory())
-                .launch();
-    }
-
-    @Override
-    public int getMetricsCategory() {
-        return SettingsEnums.CONVERT_FBE;
-    }
-}
diff --git a/src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java b/src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java
index 7556d23..47f47ce 100644
--- a/src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java
+++ b/src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java
@@ -477,7 +477,6 @@
         controllers.add(new HdcpCheckingPreferenceController(context));
         controllers.add(new BluetoothSnoopLogPreferenceController(context));
         controllers.add(new OemUnlockPreferenceController(context, activity, fragment));
-        controllers.add(new FileEncryptionPreferenceController(context));
         controllers.add(new PictureColorModePreferenceController(context, lifecycle));
         controllers.add(new WebViewAppPreferenceController(context));
         controllers.add(new CoolColorTemperaturePreferenceController(context));
diff --git a/src/com/android/settings/development/FileEncryptionPreferenceController.java b/src/com/android/settings/development/FileEncryptionPreferenceController.java
deleted file mode 100644
index 82a58ba..0000000
--- a/src/com/android/settings/development/FileEncryptionPreferenceController.java
+++ /dev/null
@@ -1,85 +0,0 @@
-/*
- * Copyright (C) 2017 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.settings.development;
-
-import android.content.Context;
-import android.os.RemoteException;
-import android.os.ServiceManager;
-import android.os.storage.IStorageManager;
-import android.text.TextUtils;
-import android.sysprop.CryptoProperties;
-import androidx.annotation.VisibleForTesting;
-import androidx.preference.Preference;
-
-import com.android.settings.R;
-import com.android.settings.core.PreferenceControllerMixin;
-import com.android.settingslib.development.DeveloperOptionsPreferenceController;
-
-public class FileEncryptionPreferenceController extends DeveloperOptionsPreferenceController
-        implements PreferenceControllerMixin {
-
-    private static final String KEY_CONVERT_FBE = "convert_to_file_encryption";
-    private static final String KEY_STORAGE_MANAGER = "mount";
-
-    private final IStorageManager mStorageManager;
-
-    public FileEncryptionPreferenceController(Context context) {
-        super(context);
-
-        mStorageManager = getStorageManager();
-    }
-
-    @Override
-    public boolean isAvailable() {
-        if (mStorageManager == null) {
-            return false;
-        }
-
-        try {
-            return mStorageManager.isConvertibleToFBE();
-        } catch (RemoteException e) {
-            return false;
-        }
-    }
-
-    @Override
-    public String getPreferenceKey() {
-        return KEY_CONVERT_FBE;
-    }
-
-    @Override
-    public void updateState(Preference preference) {
-        if (CryptoProperties.type().orElse(CryptoProperties.type_values.NONE) !=
-            CryptoProperties.type_values.FILE) {
-            return;
-        }
-
-        mPreference.setEnabled(false);
-        mPreference.setSummary(
-                mContext.getResources().getString(R.string.convert_to_file_encryption_done));
-    }
-
-    private IStorageManager getStorageManager() {
-        try {
-            return IStorageManager.Stub.asInterface(
-                    ServiceManager.getService(KEY_STORAGE_MANAGER));
-        } catch (VerifyError e) {
-            // Used for tests since Robolectric cannot initialize this class.
-            return null;
-        }
-    }
-}
\ No newline at end of file
diff --git a/src/com/android/settings/wifi/dpp/WifiDppQrCodeScannerFragment.java b/src/com/android/settings/wifi/dpp/WifiDppQrCodeScannerFragment.java
index d8bdf32..528fbc3 100644
--- a/src/com/android/settings/wifi/dpp/WifiDppQrCodeScannerFragment.java
+++ b/src/com/android/settings/wifi/dpp/WifiDppQrCodeScannerFragment.java
@@ -168,10 +168,18 @@
                     break;
 
                 case MESSAGE_SCAN_ZXING_WIFI_FORMAT_SUCCESS:
+                    final Context context = getContext();
+                    if (context == null) {
+                        // Context may be null if the message is received after the Activity has
+                        // been destroyed
+                        Log.d(TAG, "Scan success but context is null");
+                        return;
+                    }
+
                     // We may get 2 WifiConfiguration if the QR code has no password in it,
                     // one for open network and one for enhanced open network.
                     final WifiManager wifiManager =
-                            getContext().getSystemService(WifiManager.class);
+                            context.getSystemService(WifiManager.class);
                     final WifiNetworkConfig qrCodeWifiNetworkConfig =
                             (WifiNetworkConfig)msg.obj;
                     final List<WifiConfiguration> qrCodeWifiConfigurations =
diff --git a/src/com/android/settings/wifi/qrcode/QrCamera.java b/src/com/android/settings/wifi/qrcode/QrCamera.java
index 3865eb1..d07c543 100644
--- a/src/com/android/settings/wifi/qrcode/QrCamera.java
+++ b/src/com/android/settings/wifi/qrcode/QrCamera.java
@@ -124,6 +124,7 @@
         }
         if (mCamera != null) {
             mCamera.stopPreview();
+            releaseCamera();
         }
     }
 
diff --git a/tests/robotests/assets/exempt_not_implementing_index_provider b/tests/robotests/assets/exempt_not_implementing_index_provider
index d4a1c2e..6a1a1ff 100644
--- a/tests/robotests/assets/exempt_not_implementing_index_provider
+++ b/tests/robotests/assets/exempt_not_implementing_index_provider
@@ -15,7 +15,6 @@
 com.android.settings.applications.appinfo.WriteSettingsDetails
 com.android.settings.applications.AppLaunchSettings
 com.android.settings.applications.AppStorageSettings
-com.android.settings.applications.ConfirmConvertToFbe
 com.android.settings.applications.ProcessStatsDetail
 com.android.settings.applications.ProcessStatsSummary
 com.android.settings.applications.ProcessStatsUi
diff --git a/tests/robotests/src/com/android/settings/development/FileEncryptionPreferenceControllerTest.java b/tests/robotests/src/com/android/settings/development/FileEncryptionPreferenceControllerTest.java
deleted file mode 100644
index 0784a61..0000000
--- a/tests/robotests/src/com/android/settings/development/FileEncryptionPreferenceControllerTest.java
+++ /dev/null
@@ -1,116 +0,0 @@
-/*
- * Copyright (C) 2017 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.settings.development;
-
-import static com.google.common.truth.Truth.assertThat;
-
-import static org.mockito.ArgumentMatchers.anyBoolean;
-import static org.mockito.ArgumentMatchers.anyString;
-import static org.mockito.Mockito.never;
-import static org.mockito.Mockito.verify;
-import static org.mockito.Mockito.when;
-
-import android.content.Context;
-import android.os.RemoteException;
-import android.os.storage.IStorageManager;
-import android.sysprop.CryptoProperties;
-import androidx.preference.Preference;
-import androidx.preference.PreferenceScreen;
-
-import com.android.settings.R;
-
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.mockito.Mock;
-import org.mockito.MockitoAnnotations;
-import org.robolectric.RobolectricTestRunner;
-import org.robolectric.RuntimeEnvironment;
-import org.robolectric.util.ReflectionHelpers;
-
-@RunWith(RobolectricTestRunner.class)
-public class FileEncryptionPreferenceControllerTest {
-
-    @Mock
-    private Preference mPreference;
-    @Mock
-    private PreferenceScreen mPreferenceScreen;
-    @Mock
-    private IStorageManager mStorageManager;
-
-    private Context mContext;
-    private FileEncryptionPreferenceController mController;
-
-    @Before
-    public void setup() {
-        MockitoAnnotations.initMocks(this);
-        mContext = RuntimeEnvironment.application;
-        mController = new FileEncryptionPreferenceController(mContext);
-        when(mPreferenceScreen.findPreference(mController.getPreferenceKey()))
-            .thenReturn(mPreference);
-    }
-
-    @Test
-    public void isAvailable_storageManagerNull_shouldBeFalse() {
-        ReflectionHelpers.setField(mController, "mStorageManager", null);
-
-        assertThat(mController.isAvailable()).isFalse();
-    }
-
-    @Test
-    public void isAvailable_notConvertibleToFBE_shouldBeFalse() throws RemoteException {
-        ReflectionHelpers.setField(mController, "mStorageManager", mStorageManager);
-        when(mStorageManager.isConvertibleToFBE()).thenReturn(false);
-
-        assertThat(mController.isAvailable()).isFalse();
-    }
-
-    @Test
-    public void isAvailable_convertibleToFBE_shouldBeTrue() throws RemoteException {
-        ReflectionHelpers.setField(mController, "mStorageManager", mStorageManager);
-        when(mStorageManager.isConvertibleToFBE()).thenReturn(true);
-
-        assertThat(mController.isAvailable()).isTrue();
-    }
-
-    @Test
-    public void updateState_settingIsNotFile_shouldDoNothing() throws RemoteException {
-        ReflectionHelpers.setField(mController, "mStorageManager", mStorageManager);
-        when(mStorageManager.isConvertibleToFBE()).thenReturn(true);
-        mController.displayPreference(mPreferenceScreen);
-        CryptoProperties.type(CryptoProperties.type_values.NONE);
-
-        mController.updateState(mPreference);
-
-        verify(mPreference, never()).setEnabled(anyBoolean());
-        verify(mPreference, never()).setSummary(anyString());
-    }
-
-    @Test
-    public void updateState_settingIsFile_shouldSetSummaryAndDisablePreference()
-            throws RemoteException {
-        ReflectionHelpers.setField(mController, "mStorageManager", mStorageManager);
-        when(mStorageManager.isConvertibleToFBE()).thenReturn(true);
-        mController.displayPreference(mPreferenceScreen);
-        CryptoProperties.type(CryptoProperties.type_values.FILE);
-
-        mController.updateState(mPreference);
-
-        verify(mPreference).setEnabled(false);
-        verify(mPreference).setSummary(mContext.getString(R.string.convert_to_file_encryption_done));
-    }
-}