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: Iad14c14dffdd6998bf367519dfd134d97439c7bd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>