Use sonar even if hedphone jack is in use

From Aslak on 2017/01/10 22:16:28 +0000

Perhaps the sonar could play through the alarm output (or a possibility to configure this) , as at least on my device this results in it being played on phone speakers regardless of hedphone jack. I understand that its not possible for both headphones and speakers to play both channels at the same time, but ive set my device up to start sleeptracking after playing aydiobook for a set time, and i use the jack for that. See what i meen?

Copied from original feature request: http://urbandroid.uservoice.com/forums/264867-sleep-as-android/suggestions/17685979-use-sonar-even-if-hedphone-jack-is-in-use