Disallow modifying USB in Settings

Background
* The admin can disable signaling over USB
  on corporate owned device.

Changes
* If the admin has disabled signaling over
  USB, disable preferences in Settings to
  modify USB.
* Show policy transparency dialogs.

Manual Testing:
* Install TestDPC
* Set up as Device Owner
* Disable USB data signaling
* Verify Settings > Connected Devices
  > USB is disabled
* Verify Settings > Network & Internet
  > Hotspot & tethering > USB tethering
  is disabled
* Verify Developer options >
  USB debugging, default USB configurations
  and USB audio routing are disabled

Bug: 168301639
Test: Manual Testing
      make RunSettingsRoboTests -j ROBOTEST_FILTER=TetherSettingsTest
      make RunSettingsRoboTests -j
      ROBOTEST_FILTER=UsbAudioRoutingPreferenceControllerTest
      make RunSettingsRoboTests -j
      ROBOTEST_FILTER=UsbDefaultFragmentTest
      make RunSettingsRoboTests -j
      ROBOTEST_FILTER=DevelopmentSettingsDashboardFragmentTest
      make RunSettingsRoboTests -j
      ROBOTEST_FILTER=DefaultUsbConfigurationPreferenceControllerTest
      make RunSettingsLibRoboTests -j
      ROBOTEST_FILTER=EnableAdbPreferenceControllerTest

Change-Id: I3e8461ac37f406a407c874598335cde28fb89b2d
Merged-In: I3e8461ac37f406a407c874598335cde28fb89b2d

src/com/android/settings/development/DefaultUsbConfigurationPreferenceController.java

@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2021 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.android.settingslib.RestrictedLockUtilsInternal.checkIfUsbDataSignalingIsDisabled;
+
+import android.content.Context;
+import android.os.UserHandle;
+
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settingslib.RestrictedSwitchPreference;
+import com.android.settingslib.development.DeveloperOptionsPreferenceController;
+
+public class DefaultUsbConfigurationPreferenceController extends
+        DeveloperOptionsPreferenceController {
+
+    private static final String PREFERENCE_KEY = "default_usb_configuration";
+
+    private RestrictedSwitchPreference mPreference;
+
+    public DefaultUsbConfigurationPreferenceController(Context context) {
+        super(context);
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return PREFERENCE_KEY;
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreference = screen.findPreference(getPreferenceKey());
+    }
+
+    @Override
+    public void updateState(Preference preference) {
+        mPreference.setDisabledByAdmin(
+                checkIfUsbDataSignalingIsDisabled(mContext, UserHandle.myUserId()));
+    }
+}

src/com/android/settings/development/DevelopmentSettingsDashboardFragment.java

@@ -560,8 +560,7 @@ public class DevelopmentSettingsDashboardFragment extends RestrictedDashboardFra
         controllers.add(new DefaultLaunchPreferenceController(context, "demo_mode"));
         controllers.add(new DefaultLaunchPreferenceController(context, "quick_settings_tiles"));
         controllers.add(new DefaultLaunchPreferenceController(context, "feature_flags_dashboard"));
-        controllers.add(
-                new DefaultLaunchPreferenceController(context, "default_usb_configuration"));
+        controllers.add(new DefaultUsbConfigurationPreferenceController(context));
         controllers.add(new DefaultLaunchPreferenceController(context, "density"));
         controllers.add(new DefaultLaunchPreferenceController(context, "background_check"));
         controllers.add(new DefaultLaunchPreferenceController(context, "inactive_apps"));

src/com/android/settings/development/UsbAudioRoutingPreferenceController.java

@@ -16,14 +16,19 @@
 
 package com.android.settings.development;
 
+import static com.android.settingslib.RestrictedLockUtilsInternal.checkIfUsbDataSignalingIsDisabled;
+
 import android.content.Context;
+import android.os.UserHandle;
 import android.provider.Settings;
 
 import androidx.annotation.VisibleForTesting;
 import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
 import androidx.preference.SwitchPreference;
 
 import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settingslib.RestrictedSwitchPreference;
 import com.android.settingslib.development.DeveloperOptionsPreferenceController;
 
 public class UsbAudioRoutingPreferenceController extends DeveloperOptionsPreferenceController
@@ -36,6 +41,8 @@ public class UsbAudioRoutingPreferenceController extends DeveloperOptionsPrefere
     @VisibleForTesting
     static final int SETTING_VALUE_OFF = 0;
 
+    private RestrictedSwitchPreference mPreference;
+
     public UsbAudioRoutingPreferenceController(Context context) {
         super(context);
     }
@@ -45,6 +52,12 @@ public class UsbAudioRoutingPreferenceController extends DeveloperOptionsPrefere
         return USB_AUDIO_KEY;
     }
 
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreference = screen.findPreference(getPreferenceKey());
+    }
+
     @Override
     public boolean onPreferenceChange(Preference preference, Object newValue) {
         final boolean isEnabled = (Boolean) newValue;
@@ -58,7 +71,9 @@ public class UsbAudioRoutingPreferenceController extends DeveloperOptionsPrefere
     public void updateState(Preference preference) {
         final int usbAudioRoutingMode = Settings.Secure.getInt(mContext.getContentResolver(),
                 Settings.Secure.USB_AUDIO_AUTOMATIC_ROUTING_DISABLED, SETTING_VALUE_OFF);
-        ((SwitchPreference) mPreference).setChecked(usbAudioRoutingMode != SETTING_VALUE_OFF);
+        mPreference.setChecked(usbAudioRoutingMode != SETTING_VALUE_OFF);
+        mPreference.setDisabledByAdmin(
+                checkIfUsbDataSignalingIsDisabled(mContext, UserHandle.myUserId()));
     }
 
     @Override