Merge "decouple Bubble from NotificationEntry" into rvc-dev am: 7fc567f7a3 am: 2aab9277e0 am: 5b24703e52

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11668704

Change-Id: Iff5381e1cc5d386e1ed1800cee0cff2182cf5581