Add warning message when power save mode is enabled for smart auto rotate settings fragment

Test: locally with flame, make RunSettingsRoboTests -j96
ROBOTEST_FILTER=SmartAutoRotateBatterySaverControllerTest,SmartAutoRotateControllerTest

Bug: 186690152
Change-Id: Ibac90a4edd4631e8256da79d0594ac7704b5f8f7
7 files changed