Merge "Add missing enum value" into tm-qpr-dev am: 1f8fded512

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19783121

Change-Id: I956929c0f357983bad64c909b12d02b72dca0357
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

core/proto/android/app/notificationmanager.proto

@@ -45,6 +45,8 @@ message PolicyProto {
         MEDIA = 7;
         // System (catch-all for non-never suppressible sounds) are prioritized.
         SYSTEM = 8;
+        // Priority conversations are prioritized
+        CONVERSATIONS = 9;
     }
     repeated Category priority_categories = 1;