Merge "Add support for (explicitly) parallel sync-groups" into udc-dev am:...

Merge "Add support for (explicitly) parallel sync-groups" into udc-dev am: 66c3f036 am: d405dc8c am: c45c4425

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22658526



Change-Id: I51ed19330d483d6509d7957e7cc231c11affdfe8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>