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/NotificationBackend.java

@@ -268,6 +268,15 @@ public class NotificationBackend {
         }
     }
 
+    public boolean hasSentValidMsg(String pkg, int uid) {
+        try {
+            return sINM.hasSentValidMsg(pkg, uid);
+        } catch (Exception e) {
+            Log.w(TAG, "Error calling NoMan", e);
+            return false;
+        }
+    }
+
     public boolean isInInvalidMsgState(String pkg, int uid) {
         try {
             return sINM.isInInvalidMsgState(pkg, uid);