Add @SafeVarargs to ActivityOptionsCompat to match framework version

Change-Id: Iacd7a93bdefbb268bc162721198f56eb61777fcf
diff --git a/compat/java/android/support/v4/app/ActivityOptionsCompat.java b/compat/java/android/support/v4/app/ActivityOptionsCompat.java
index 692b202..b5585a2 100644
--- a/compat/java/android/support/v4/app/ActivityOptionsCompat.java
+++ b/compat/java/android/support/v4/app/ActivityOptionsCompat.java
@@ -240,6 +240,7 @@
      * @return Returns a new ActivityOptions object that you can use to
      *         supply these options as the options Bundle when starting an activity.
      */
+    @SafeVarargs
     public static ActivityOptionsCompat makeSceneTransitionAnimation(Activity activity,
             Pair<View, String>... sharedElements) {
         if (Build.VERSION.SDK_INT >= 21) {