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

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



Change-Id: Ie5aedc1ed8789bd0f8fdd1006ccf453e5b70645b
Ignore-AOSP-First: this is an automerge
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>