Add getSystemService(Class<T>) to align the capability with framework
part.
This is a back port from aosp/1639943, aosp/1645152 and aosp/1648047
Bug: 179640862
Test: local
Change-Id: I035db55a71f94000ca35f8d71f03c19208423c73
Replace WiFi related terms which contain Master wording.
Goal: Create a fixit for Android Platform to reduce the use of non-inclusive language for all code.
Bug: 161425297
Test: make RunSettingsRoboTests -j or
make RunSettingsRoboTests ROBOTEST_FILTER=DashboardFragmentTest
make RunSettingsRoboTests ROBOTEST_FILTER=WirelessDebuggingPreferenceControllerTest
make RunSettingsRoboTests ROBOTEST_FILTER=AutomaticStorageManagementSwitchPreferenceControllerTest
make RunSettingsRoboTests ROBOTEST_FILTER=AllInOneTetherPreferenceControllerTest
make RunSettingsRoboTests ROBOTEST_FILTER=TopLevelNetworkEntryPreferenceControllerTest
make RunSettingsRoboTests ROBOTEST_FILTER=PrimarySwitchPreferenceTest
make RunSettingsRoboTests ROBOTEST_FILTER=WifiPrimarySwitchPreferenceControllerTest
make RunSettingsRoboTests ROBOTEST_FILTER=WifiTetherPreferenceControllerTest
Change-Id: I9395c50e092e124016609f88f7c8151554a0d874