Insert missing breaks

Found you!

Test: Go multi-window, go fullscreen, hammer home button
Change-Id: I019d89b95588ab2a0e33d9ef2bdc7240111162d0
Fixes: 36339388
diff --git a/services/core/java/com/android/server/am/ActivityMetricsLogger.java b/services/core/java/com/android/server/am/ActivityMetricsLogger.java
index 494aaa7..08ff7de 100644
--- a/services/core/java/com/android/server/am/ActivityMetricsLogger.java
+++ b/services/core/java/com/android/server/am/ActivityMetricsLogger.java
@@ -254,8 +254,7 @@
      *                       ActivityManagerInternal.APP_TRANSITION_* reasons.
      */
     void notifyTransitionStarting(SparseIntArray stackIdReasons) {
-        // TODO (b/36339388): Figure out why stackIdReasons can be null
-        if (stackIdReasons == null || !isAnyTransitionActive() || mLoggedTransitionStarting) {
+        if (!isAnyTransitionActive() || mLoggedTransitionStarting) {
             return;
         }
         mCurrentTransitionDelayMs = calculateCurrentDelay();