Merge "decouple Bubble from NotificationEntry" into rvc-dev am: 7fc567f7a3 am: 2aab9277e0 am: 5b24703e52 am: 7f0c392328

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

Change-Id: Id474023d2a0299f5e84f7b8be42719a70adfed50