Merge "Store trusted AttributionSources without token" into udc-dev am: f0ebf50841 am: 8a7e07ccc8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24708071

Change-Id: Ic52aa843e9062c48cb1ce3780520b6bf921476da
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>