Add setRelativeLayer to TransactionCompat am: 972ace00d0

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12089062

Change-Id: Ic1194e5746e3fa14154961a8bce0d18d76845654

packages/SystemUI/shared/src/com/android/systemui/shared/system/TransactionCompat.java

@@ -114,6 +114,11 @@ public class TransactionCompat {
         t.deferTransactionUntil(surfaceControl, barrier, frameNumber);
     }
 
+    public static void setRelativeLayer(Transaction t, SurfaceControl surfaceControl,
+            SurfaceControl relativeTo, int z) {
+        t.setRelativeLayer(surfaceControl, relativeTo, z);
+    }
+
     @Deprecated
     public static void setEarlyWakeup(Transaction t) {
     }