Merge "Add initial corner radius to pin button." into tm-qpr-dev am: dbed209f am: be53ffc4

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21373625



Change-Id: I3a8545a95976d9b8cd1168a9ce5e5ba37e688120
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>