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: 7ae32088 am: b4e01abd

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



Change-Id: Ia3d7f121f86814686eae221d8330577aad67c9dc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>