Bluetooth: Call vendor cleanup() in Close()

Bug: 62453652
Test: sailfish and angler start/stop Bluetooth, pair
Change-Id: I8ba80ae1802d1f524acb1d8e26b5bb41fc1612d0
diff --git a/bluetooth/1.0/default/vendor_interface.cc b/bluetooth/1.0/default/vendor_interface.cc
index bb66460..a291e14 100644
--- a/bluetooth/1.0/default/vendor_interface.cc
+++ b/bluetooth/1.0/default/vendor_interface.cc
@@ -282,6 +282,8 @@
 
     int power_state = BT_VND_PWR_OFF;
     lib_interface_->op(BT_VND_OP_POWER_CTRL, &power_state);
+
+    lib_interface_->cleanup();
   }
 
   if (lib_handle_ != nullptr) {