Wifi usability: add four new fields to report the latest celluar signal
strength

cellularDataNetworkType
cellularSignalStrengthDbm
cellularSignalStrengthDb
isSameRegisteredCell

Bug: 123095038
Test: Unit tests for Wifi: frameworks/base/wifi/tests/runtest.sh

Change-Id: I090e2ab1a327894dfc84e6ce880e887311e1df7d
4 files changed