Merge "Don't show immersive mode dialog over dream window" into rvc-dev am: 3a21399c am: c3e1f71c am: de6835dc

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11953484

Change-Id: I3bfb9edf0e9b612f088731940e181fce9447873e