bluez: revert all things

This reverts commit 3394607d55606e044f62bd393ec3c0a0778dfbe6.
This reverts commit a64a443bc67a9f0f748a11f33224be0ba40d353e.
This reverts commit 8a2fee1237a3d57cba875a32c5b1086cc8aafc8e.

Change-Id: I9b5e384ebef647fda5e28e827ae064ab42a0da9c
bluedroid: add libbt-vendor

Change-Id: I08edd1be3991646185d526bb2c22b4c28a6cf545
bluedroid: clean up unneeded leftovers

Change-Id: I199ffc16104f6a12fc9887a12316bf02bb076d2f
use global flag for qcom voip

Change-Id: I3d77ccb9169a272d486d2cfea088df665aaaacd2