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/BubbleNotificationSettings.java

@@ -1,65 +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 android.app.settings.SettingsEnums;
-import android.content.Context;
-import android.provider.SearchIndexableResource;
-
-import com.android.settings.R;
-import com.android.settings.core.OnActivityResultListener;
-import com.android.settings.dashboard.DashboardFragment;
-import com.android.settings.search.BaseSearchIndexProvider;
-import com.android.settingslib.search.SearchIndexable;
-
-import java.util.Arrays;
-import java.util.List;
-
-@SearchIndexable
-public class BubbleNotificationSettings extends DashboardFragment implements
-        OnActivityResultListener {
-    private static final String TAG = "BubbleNotiSettings";
-
-    @Override
-    public int getMetricsCategory() {
-        return SettingsEnums.BUBBLE_SETTINGS;
-    }
-
-    @Override
-    protected String getLogTag() {
-        return TAG;
-    }
-
-    @Override
-    protected int getPreferenceScreenResId() {
-        return R.xml.bubble_notification_settings;
-    }
-
-    /**
-     * For Search.
-     */
-    public static final SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
-            new BaseSearchIndexProvider() {
-                @Override
-                public List<SearchIndexableResource> getXmlResourcesToIndex(
-                        Context context, boolean enabled) {
-                    final SearchIndexableResource sir = new SearchIndexableResource(context);
-                    sir.xmlResId = R.xml.bubble_notification_settings;
-                    return Arrays.asList(sir);
-                }
-            };
-}