Merge "Add some basic tests for BubblePositioner" into udc-qpr-dev am: 9d72f3b2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24315279



Change-Id: Ie1e72ffb0b008f7c9e8f9f56d8cc3ce7a451db84
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>