[util-44] Default audio routes for hammerhead input devices. Fixes JB#26733
[util-44] Default audio routes for hammerhead input devices. Fixes JB#26733

Nexus 5 hammerhead HAL considers AUDIO_SOURCE_DEFAULT as "no source" and
recording is muted. Define default audio source for all input devices to
get audible recordings with hammerhead.

ballock/pulseaudio-modules-droid,mer-hybris/pulseaudio-modules-droid,mer-hybris/pulseaudio-modules-droid,jusa/pulseaudio-modules-droid,mlehtima/pulseaudio-modules-droid,mlehtima/pulseaudio-modules-droid,ballock/pulseaudio-modules-droid,jusa/pulseaudio-modules-droid