WIP: bluetooth build setup/config

Change-Id: Id1ca2fa17c7a6a31a5fc339e6c3e5bb4f1a4c449
WIP: libbt-vendor

* NOTE: needs cleanup and proper "sleep/wake" handling
* WARNING: due to no "sleep/wake" handling, can prevent
           device from entering sleep sometimes

Change-Id: Iab5ef9732918e036cedf4c8bfbb55ce2d1882d8d
audio/audio_route: use mixer_ctl_set_array to set values

Note that the "integer" value array needs to be a long array

Change-Id: I41c6ce143eedc47801faf1e5e01d9dd4276fc05b