Merge "Avoid deadlock in EventThread::onNewVsyncSchedule" into udc-dev am: e6cfeaad1f am: 9464ea51a6

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/22125708

Change-Id: Iffaa584d3f28b04c52d5ed59a1b83b82ae350300
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>