Add check volume group id uniqueness

If a volume group id is present it must be unique among all volume
groups in the same config. Future change should take into account audio
zone, zone config id, and volume group id to update the volume info.

Bug: 359686069
Bug: 379200397
Test: atest com.android.car.audio
Flag: android.car.feature.audio_control_hal_configuration
Change-Id: I3dbbfee01a78ffad0acb5d59a4594afccbd6f7ac