Merge "[MediaProjection] Handle null DisplayContent when trying to set the...

Merge "[MediaProjection] Handle null DisplayContent when trying to set the session" into udc-dev am: 9a50b8ad am: 560ae095 am: eb77e43a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23201202



Change-Id: Iae2cff84bf3445067ec2d94d2f464588c120e4c5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>