Cancel launcher app transition when changing states

The app transition might change an object that the new
state depends on, causing an inconsistent state.

Bug: 72816542
Change-Id: Ia6dd52971b52be5589c88f4f6d93d06146fbadab

src/com/android/launcher3/LauncherAppTransitionManager.java

@@ -64,4 +64,8 @@ public class LauncherAppTransitionManager {
     public Bundle getActivityLaunchOptions(Launcher launcher, View v) {
         return getDefaultActivityLaunchOptions(launcher, v);
     }
+
+    /** Cancels the current transition animation */
+    public void finishAnimation() {
+    }
 }