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
Change-Id: If0d26f05399a33269d9540e6e09292ce46765637
1 file changed