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

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

Change-Id: I1b01e8320b2fb091257a1cd57c96f51bf94e49b4