Once auto-battery saver is ever set, don't show suggestion

Bug: 77228046
Test: manual test after adb shell settings delete secure suppress_auto_battery_saver_suggestion
Test: m -j ROBOTEST_FILTER=BatterySaverButtonPreferenceControllerTest RunSettingsRoboTests
Test: b ROBOTEST_FILTER=BatterySaverUtilsTest RunSettingsLibRoboTests
Change-Id: Ib224263dc20e7844b7a79fe175fde26c773bd05a
3 files changed