Media agent for Android v5.0.2

Bug fixes

• ExoPlayer / HLS: contentBitrate always reported 0 for HLS streams. media3 internally classifies mixed audio+video HLS segment loads as TRACK_TYPE_DEFAULT rather than TRACK_TYPE_VIDEO (unlike DASH and progressive streams, which were unaffected). The tracker's bitrate-capture logic only fired for TRACK_TYPE_VIDEO, so HLS loads never populated the field. contentBitrate now correctly reflects the actual stream bitrate for HLS content.