Move feature-level Bubble setting into developer options; default to off

Functionality:
* Moves feature-level setting into developer settings (apps section)
* Adds bubbles in developer options under "apps" section
* Configures the app-specific bubble toggle in notifications settings
  to be hidden / shown based on the developer setting
* Configures the channel-specific bubble toggle in notification channel
  settings to be hidden / shown based on the developer setting

Tests:
* Anything that might be assuming that it's globally enabled now has
  a bit to enable it globally in that test
* There is a logic change now where the app-level setting would be available
  even if off globally, now that is not true -- if it's off globally the
  app-level is no longer available
* Adds tests for the developer setting

Test: make -j40 RunSettingsRoboTests ROBOTEST_FILTER="Bubble"
Bug: 131845765
Change-Id: I5f6bf74e5ada3fc023571825cca10d7bddc60e6e

src/com/android/settings/notification/BubbleSummaryNotificationPreferenceController.java

@@ -1,53 +0,0 @@
-/*
- * Copyright (C) 2019 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.notification;
-
-import static android.provider.Settings.Secure.NOTIFICATION_BUBBLES;
-
-import android.content.Context;
-import android.provider.Settings;
-
-import com.android.settings.R;
-import com.android.settings.core.BasePreferenceController;
-
-import androidx.annotation.VisibleForTesting;
-
-public class BubbleSummaryNotificationPreferenceController extends BasePreferenceController {
-
-    @VisibleForTesting
-    static final int ON = 1;
-
-    public BubbleSummaryNotificationPreferenceController(Context context, String preferenceKey) {
-        super(context, preferenceKey);
-    }
-
-    @Override
-    public CharSequence getSummary() {
-        return mContext.getString(
-                areBubblesEnabled() ? R.string.switch_on_text : R.string.switch_off_text);
-    }
-
-    @Override
-    public int getAvailabilityStatus() {
-        return AVAILABLE;
-    }
-
-    private boolean areBubblesEnabled() {
-        return Settings.Secure.getInt(mContext.getContentResolver(),
-                NOTIFICATION_BUBBLES, ON) == ON;
-    }
-}