Revert "alsa_sound: Only route if devices change" breaks in call audio

This reverts commit 4302f22bb3dcf6b1d5f99d3480e8fe1896364124.

Original Commit breaks incoming call audio when ringer set to vibrate or silent

Change-Id: Ib5c4daee2c77fff27461971dc0067cd3dcaaf1ca
Merge "Revert "alsa_sound: Only route if devices change" breaks in call audio" into cm-10.1