[AA+] Log additional UI events with Launcher snapshot logging.

Bug: 180418845
Test: Manual
Change-Id: I74ab1faafe6c21a8fbf6992a8aebe918cc31d85e

quickstep/src/com/android/launcher3/model/QuickstepModelDelegate.java

@@ -148,10 +148,13 @@ public class QuickstepModelDelegate extends ModelDelegate implements OnIDPChange
                         ? (FolderInfo) itemsIdMap.get(info.container) : null;
                 StatsLogCompatManager.writeSnapshot(info.buildProto(parent), instanceId);
             }
+            additionalSnapshotEvents(instanceId);
             prefs.edit().putLong(LAST_SNAPSHOT_TIME_MILLIS, now).apply();
         }
     }
 
+    protected void additionalSnapshotEvents(InstanceId snapshotInstanceId){}
+
     @Override
     public void validateData() {
         super.validateData();