Merge "Make observer explicitly ask for nullable any in...

Merge "Make observer explicitly ask for nullable any in setSourcesToDifference" into udc-dev am: 36fc639b

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Permission/+/22862429



Change-Id: I7e97ae9c8fdf823f5da87d5fae5d076c647c45fc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>