Merge "Ignore window manager dumps with no timestamp in timeline" into udc-dev am: 1a4ebace28 am: 9f59f382cb am: 77942abef7 am: be7a4a499e

Original change: https://googleplex-android-review.googlesource.com/c/platform/development/+/23660823

Change-Id: I3903e3603e4f3f34913e323cbbae2317bce738a1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>