App Bubble control page should always be available, even if off globally

There is API to open up the app-specific bubble page, therefor, we should
always show the toggle. The previous work to move bubbles to developer
settings broke this.

This CL adds a param to the controller to note whether it's the app
specific page or not (since controller is also used for channel settings)
to enable this behaviour.

Added a test for this situation.

Test: make -j40 RunSettingsRoboTests ROBOTEST_FILTER=Bubble
Bug: 131846917
Change-Id: I72b1f4b5b033d1b24281061cfa6bed4d734dfcb1

tests/robotests/src/com/android/settings/notification/BubblePreferenceControllerTest.java

@@ -78,6 +78,7 @@ public class BubblePreferenceControllerTest {
     private FragmentManager mFragmentManager;
 
     private BubblePreferenceController mController;
+    private BubblePreferenceController mAppPageController;
 
     @Before
     public void setUp() {
@@ -87,7 +88,10 @@ public class BubblePreferenceControllerTest {
         shadowApplication.setSystemService(Context.USER_SERVICE, mUm);
         mContext = RuntimeEnvironment.application;
         when(mFragmentManager.beginTransaction()).thenReturn(mock(FragmentTransaction.class));
-        mController = spy(new BubblePreferenceController(mContext, mFragmentManager, mBackend));
+        mController = spy(new BubblePreferenceController(mContext, mFragmentManager, mBackend,
+                false /* isAppPage */));
+        mAppPageController = spy(new BubblePreferenceController(mContext, mFragmentManager,
+                mBackend, true /* isAppPage */));
     }
 
     @Test
@@ -150,6 +154,16 @@ public class BubblePreferenceControllerTest {
         assertFalse(mController.isAvailable());
     }
 
+    @Test
+    public void testIsAvailable_app_evenIfOffGlobally() {
+        NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();
+        mAppPageController.onResume(appRow, null, null, null);
+        Settings.Secure.putInt(mContext.getContentResolver(),
+                NOTIFICATION_BUBBLES, SYSTEM_WIDE_OFF);
+
+        assertTrue(mAppPageController.isAvailable());
+    }
+
     @Test
     public void testIsAvailable_app() {
         NotificationBackend.AppRow appRow = new NotificationBackend.AppRow();