am 1f84dbc5: Merge changes from topic \'system-bt\'

* commit '1f84dbc554c4bea2e83202796451a58bf12c2291':
  Change path to bluetooth stack
  Include new hci_audio.h for SCO_* constants
  Move gen-buildcfg.sh into libbt so there isn't project cross-reference
tree: addef1170951c447b3e74749086484c0f8a0730b
  1. conf/
  2. include/
  3. src/
  4. Android.mk
  5. gen-buildcfg.sh
  6. vnd_buildcfg.mk