lpsink: Change default audio sink
lpsink: Change default audio sink

DCO-1.0-Signed-off-by: Jeongseok Kim <0c03ab7a1b32f29697716389c3f9549845834271@lge.com>

Change-Id: I8f7e0cf083dbfd7c4c162478e57fdfed483396cb
Reviewed-on: https://gpro.palm.com/4372
Reviewed-by: Jeongseok Kim <0c03ab7a1b32f29697716389c3f9549845834271@lge.com>
Tested-by: Jeongseok Kim <0c03ab7a1b32f29697716389c3f9549845834271@lge.com>

justinjoy/gst-plugins-lp,justinjoy/gst-plugins-lp