Merge "Rename Bubble#isClearable to isDismissable" into tm-qpr-dev am: f51c21d840 am: c8a3511d7e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21129950

Change-Id: I05db0cc2c0099152ab81255b6a3ce0e44101e86c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>