Merge "Notify content capture on detach before setting attachInfo to null." into sc-qpr1-dev am: 84a7a431cc

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15935219

Change-Id: Ia2a5f3d17b0a7d4803f0c6089574a4f4fb063c6a