Currently, the delimiter of genres is comma, but it is also used in the broadcast genre, so we decided to encode the genre to CSV format. Let's support only a simple CSV not a complex cases like fully double quoted string to simplify the encode/decode method and encourage the TIS to use these methods for broadcast genres. Bug: 25241891 Change-Id: Id745d4fee43dbcdc508c0f6fad83477b6209ecd8