Fix volume control when user use talk back swipe up/down or use Switch
Access to change the volume bar progress
Fix: 357028436
Fix: 357028435
Test: atest
Flag: com.android.settingslib.flags.enable_le_audio_sharing
Change-Id: Iab7d48ab8713a3a809cc8f7b28381a2b86b9be5f
1. Unregister the volume control callbacks in onDestroy
2. Reuse SeekBarPreference#setProgress
3. Fetch volume from AudioManager if got invalid volume from VC service.
Flagged with enable_le_audio_sharing
Bug: 305620450
Test: manual
Change-Id: Id63d1dbff4c3cbdeb91c2537d951c39e1a932220