Redesign the update logic of Allow Background Usage Page.

- Use one Controller to manage preferences related to battery Optimization Mode.
- Move optimization mode & preferences status update logic from Fragment to Controller.

Bug: 373544647
Test: atest AdvancedPowerUsageDetailTest  PowerBackgroundUsageDetailTest BatteryOptimizationModePreferenceControllerTest BackgroundUsageAllowabilityPreferenceControllerTest
Flag: EXEMPT for simple fix
Change-Id: I2b1fed837fb4904e4118ab51c1d0cda36c0f6198