[Ambient Volume] UI of volume sliders in Settings

Collapse/expand the controls when clicking on the hearder with arrow.

Flag: com.android.settingslib.flags.hearing_devices_ambient_volume_control
Bug: 357878944
Test: atest AmbientVolumePreferenceTest
Test: atest BluetoothDetailsAmbientVolumePreferenceControllerTest
Test: atest BluetoothDetailsHearingDeviceControllerTest

Change-Id: I845a4397601e563ed027d7d2a0a13651e95de708