Merge "Add SurfaceSyncer markdown file" into tm-dev am: c9eb12f8 am: 2d08f161 am: db903965

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17823563



Change-Id: I409d67804787723380ca56e183ab354e3f71e11c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>