Notification settings updates

- Footer preferences were too dim
- Fix text and target on recently sent apps
- Make 'behavior' a dialog
- reorder settings on apps page

Change-Id: Idf8056bc77ead89fe2025bbde3346861e23a3c8d
Fixes: 72652526
Fixes: 72651810
Fixes: 72652024
Bug: 72651953
Test: make RunSettingsRoboTests

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

@@ -119,7 +119,6 @@ public class DeletedChannelsPreferenceControllerTest {
         Preference pref = mock(Preference.class);
         mController.updateState(pref);
 
-        verify(pref, times(1)).setEnabled(false);
         verify(pref, times(1)).setSelectable(false);
         verify(mBackend, times(1)).getDeletedChannelCount(any(), anyInt());
         ArgumentCaptor<CharSequence> argumentCaptor = ArgumentCaptor.forClass(CharSequence.class);