[LE Unicast]UI can Enable/Disable VCP and CSIP

When the user turns on/off the LE audio toggle, the settings set
enabled/disabled for the LE audio profile, the VCP profile and the
CSIP profile.

- Implement the VCP profile at the settingsLib
- Modify the CachedBluetoothDevice.toString

Bug: 238866767
Test: build pass. Local test: Enable/Disable LE audio toggle and
then those profiles work properly.

Change-Id: I27dfffb73cabf9f12f62087ce2a4ba09e04af0d9