Merge "Add the ability to restrict dreams to the system user." into tm-dev am:...

Merge "Add the ability to restrict dreams to the system user." into tm-dev am: 7d094bad am: e7e6ff96 am: c3d04d52

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17088447



Change-Id: I0f3c6be0393f4c01e4faa80b4ad4233d4ad84e2e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>