Added audio artist name to Roku
Added audio artist name to Roku

This isn't being done in the best way, currently. We'll want to eventually pass 1 metadata object with these values.

openflint/Connect-SDK-iOS,screencloud/Connect-SDK-iOS,ConnectSDK/Connect-SDK-iOS,openflint/Connect-SDK-iOS,ConnectSDK/Connect-SDK-iOS,gcbeyond/Connect-SDK-iOS,screencloud/Connect-SDK-iOS,AspiroTV/Connect-SDK-iOS,riverlj/Connect-SDK-iOS,gcbeyond/Connect-SDK-iOS