Merge "Fix a potential thread safety issue in VectorDrawable" into pi-dev am: 78e73d3f am: 6a154c0c am: 4c548ab4 am: 64162814 am: 1b692301 am: 92bb88ab am: 8a822073 am: b20c58d0

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14880619

Change-Id: Idddfb4424a85b57021424a1a9cd0718f1d6968e9