Merge "Get session callback for tests" into udc-dev am: 7206bf09

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22797162



Change-Id: I011f0ce32067b9f53dac5400b83459f22e888146
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>