Launch channel settings as half sheet

If opening app has requested only a subset of fields

Test: manual - launch from an app, filtered and unfiltered, for
normal channels and conversations
Bug: 177246841
Change-Id: Ifd70478101d1ea1340d2ecc55033fab55e65ca92

Change-Id: I5194b959c82b2cfa7990c84285aaf69464cff3a8

src/com/android/settings/notification/app/ConversationNotificationSettings.java

@@ -49,10 +49,11 @@ public class ConversationNotificationSettings extends NotificationSettings {
 
         for (NotificationPreferenceController controller : mControllers) {
             controller.onResume(mAppRow, mChannel, mChannelGroup, mConversationDrawable,
-                    mConversationInfo, mSuspendedAppsAdmin, null);
+                    mConversationInfo, mSuspendedAppsAdmin, mPreferenceFilter);
             controller.displayPreference(getPreferenceScreen());
         }
         updatePreferenceStates();
+        animatePanel();
     }
 
     @Override