Only show Bubbles link for messaging apps

Apps that have sent at least one valid conversation

Test: manual, atest
Fixes: 156033178
Change-Id: If4fff6810f2e390ba0ad0f7587b8d8c2d5819c93

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

@@ -72,9 +72,20 @@ public class AppBubbleListPreferenceController extends AppConversationListPrefer
 
     @Override
     public boolean isAvailable() {
-        if (!super.isAvailable()) {
+        // copy rather than inherit super's isAvailable because apps can link to this page
+        // as part of onboarding, before they send a valid conversation notification
+        if (mAppRow == null) {
             return false;
         }
+        if (mAppRow.banned) {
+            return false;
+        }
+        if (mChannel != null) {
+            if (mBackend.onlyHasDefaultChannel(mAppRow.pkg, mAppRow.uid)
+                    || NotificationChannel.DEFAULT_CHANNEL_ID.equals(mChannel.getId())) {
+                return false;
+            }
+        }
         if (mAppRow.bubblePreference == BUBBLE_PREFERENCE_NONE) {
             return false;
         }