The `updateState` function gets called when the Developer Options menua
is rendered (opened). Originally when BT is off at this point, LE Audio
is disabled, and the user needs to reboot the device again to enable LE
Audio. This CL fixes this and marks the option as disabled when BT is
off.
Bug: 263684630
Test: Manual
Change-Id: I243e2c57fc12bfefd4ab83f63336fb41639f05a0
Add a switcher to enable/disable LE audio feature. The switcher could be
enabled by setprop ro.bluetooth.leaudio_offload.supported=true
screenshot: https://screenshot.googleplex.com/6aGP664S9PX5EMS
Bug: 233018305
Bug: 233005340
Test: make RunSettingsRoboTests ROBOTEST_FILTER=BluetoothLeAudioPreferenceControllerTest
Test: switch LE audio feature, and check LE audio functionality status
Change-Id: I8adcf27edd1438df445d32fca93f35ff5020a3b3