Add default Bluetooth HAL implementation

Also added initial target-side functional test.

Test: bluetooth_hidl_hal_test
Bug: 31972505
Change-Id: I1f574a5b2b53d7fbf65dbb4e1aaa5f8b6c5a9448
diff --git a/bluetooth/Android.bp b/bluetooth/Android.bp
index bbb3e4b..ed19a37 100644
--- a/bluetooth/Android.bp
+++ b/bluetooth/Android.bp
@@ -1,4 +1,6 @@
 // This is an autogenerated file, do not edit.
 subdirs = [
     "1.0",
+    "1.0/default",
+    "1.0/vts/functional",
 ]