Merge "[sf] only update the last latch time if the layer has a buffer" into...

Merge "[sf] only update the last latch time if the layer has a buffer" into udc-dev am: ba87aa7f am: 5855f23b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/21683988



Change-Id: I4658f06c2d682d6ad931300fe45d7854182d6b37
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>