Revert "Death to synchronous transactions (2/2)"

This reverts commit dd05f0365aa0df9ba9a7631c8e02ed67f472132d.

There seems to be some logic that gets triggered inside surface flinger
regarding commit time of the transaction, and without it seems that
animations got jankier. No time to investigate...

Bug: 28305789
Change-Id: I7261cf8719d3528f8f5bee19e507b8ba88b8b729
diff --git a/services/core/java/com/android/server/wm/WindowAnimator.java b/services/core/java/com/android/server/wm/WindowAnimator.java
index 6bc633f..eae7838 100644
--- a/services/core/java/com/android/server/wm/WindowAnimator.java
+++ b/services/core/java/com/android/server/wm/WindowAnimator.java
@@ -670,6 +670,7 @@
         if (SHOW_TRANSACTIONS) Slog.i(
                 TAG, ">>> OPEN TRANSACTION animateLocked");
         SurfaceControl.openTransaction();
+        SurfaceControl.setAnimationTransaction();
         try {
             final int numDisplays = mDisplayContentsAnimators.size();
             for (int i = 0; i < numDisplays; i++) {