[Ambient Volume] Migrate to use AmbientVolumeUiController in SettingsLib

Moove the common ui logic code into settingslib for using in both
settings and systemui.

Flag: com.android.settingslib.flags.hearing_devices_ambient_volume_control
Bug: 357878944
Test: atest AmbientVolumePreferenceTest
Test: atest BluetoothDetailsAmbientVolumePreferenceControllerTest
Change-Id: I97d5ac2d1862fed7249af8b35f04fa36fc47d16d