Merge "Add check for empty vsync data in Choreographer." into tm-dev am:...

Merge "Add check for empty vsync data in Choreographer." into tm-dev am: c2c8ac85 am: 7ab33acf am: fc4baede am: 6d3d481c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17920025



Change-Id: I27250592c9fc86b2dc7b6ab539673fbec49b348b
Ignore-AOSP-First: this is an automerge
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>