RDKTV-21873: getVolumeLevel for ARC0 port Reason for change: Added support in thunder code for ACR0 Test Procedure: Refer JIRA. Risks: Low Priority: P1 Signed-off-by: apatel859 <amit_patel5@comcast.com> Change-Id: I18ce3678facd3394db7b2e1ef9ae582929a97425