Fix "auto battery saver" confirmation dialog button layout

Bug: 77225862
Fixes: 77225862
Test: Manual test after resetting the BS states with the following commands:
adb shell settings delete global low_power
adb shell settings delete global low_power_sticky
adb shell settings delete global low_power_trigger_level
adb shell settings delete secure low_power_manual_activation_count
adb shell settings delete secure low_power_warning_acknowledged
adb shell settings delete secure suppress_auto_battery_saver

Change-Id: I2d826b1dadd3f2e2bf22746e874534d483f2cc39