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

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



Change-Id: I881b9ac56d0f3f0abe201f73aeb9ae65b099608e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>