test_vendor_lib: Dummy inquiry result

This upload mainly consists of stub command implementations to get
Bluetooth into the enabled state. The last command handled is the
inquiry command. Upon inquiry, the controller currently sends back a
dummy inquiry result for a fake device. This fake device appears under
the "Available devices" list in the UI.  Bluetooth is able to be toggled
off and on from the UI as well (i.e. it doesn't crash after switching to
on for a few seconds).

Bug: 21586676
Change-Id: Ifd42a6ab4b9338afd461d2ef4f809bdd62fcf79f