Merge "Fix a potential thread safety issue in VectorDrawable" into oc-mr1-dev...

Merge "Fix a potential thread safety issue in VectorDrawable" into oc-mr1-dev am: 61cf6455 am: 2e440eb0 am: 92ed8250 am: 454c79f7 am: 9ed0a054 am: 06254a7b am: 4c7ddfbe am: 0a37b6aa

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14880620

Change-Id: I43a5be50bcb24ce66cfedff2d6c19b54e3bebbeb