Merge "Add explicit clearSyncTransaction instead of passing null" into udc-dev am: e946897f am: 39a04c42

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22605090



Change-Id: I07413e04c1616232d158fe4203626d68dd48044d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>