SF: Add missing ATRACE_TAG to VsyncSchedule.cpp am: c621d8d2be am: 306865332f

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

Change-Id: I6be191e6157e9f6c0eea836f2ddbd0bbe1e1e59b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>