SF: Add missing ATRACE_TAG to VsyncSchedule.cpp am: c621d8d2be am: 2a7be0046a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/19035667

Change-Id: I32507c159c8a198f1d7440a44cb0bcbd7f3494d8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>