VolumeControl: Apply remote volume to Android

After bootup when LeAudio device reconnects, the volume level and mute
state is read from the remote device.
Make sure to cache those values and apply it to audio system

Bug: 290900329
Tag: #feature
Test: Manual test: Set volume max, restart phone, verify volume max is
set after rebot
Test: atest BluetoothInstrumentationTests

Change-Id: I20a6470ca92f1099202a49d49977746bb61be569