Merge "Satellite demo mode : Simulated sending and receiving" into udc-dev am: c858b2c6

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22845479



Change-Id: Id3e37c8c36008dcad22773c3579c8a41c13d509d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>