Make Bluetooth hwbinder toggleable

Test: manual
Change-Id: I2ada41a39b6af3708973438daf30f2d11ad01714
diff --git a/vintf.xml b/vintf.xml
index da5e0f0..e6c2442 100644
--- a/vintf.xml
+++ b/vintf.xml
@@ -19,7 +19,7 @@
     </hal>
     <hal format="hidl">
         <name>android.hardware.bluetooth</name>
-        <transport>passthrough</transport>
+        <transport>toggled</transport>
         <impl level="generic"></impl>
         <version>1.0</version>
     </hal>