Merge "Restricting DocumentsProvider#getType by implementing getTypeAnonymous" into udc-dev am: e990e9b6 am: 47138e7d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21669719



Change-Id: I31bd6df23dfc846215aedd4d4fe8ce51e2dea3ad
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>