[FM] Fix Buganizer ID: 18456930 - FM radio audio got routed to loudspeaker unexpectedly

https://partner-android-review.git.corp.google.com/#/c/187894/



Change-Id: I3f9175bbc302e382155e568e66b88400ec05ffa5
Signed-off-by: Hochi Huang <hochi.huang@mediatek.com>