am "Add missing system-api.txt for RTT API changes"
am "Add missing system-api.txt for RTT API changes"

merged from goog/mirror-m-wireless-internal-release
93e314e Add missing system-api.txt for RTT API changes

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base