Bluetooth: declare shared libraries as its build dependencies.

Change-Id: I9999051d31fe8d8387d0002275a15be53ea02c30
diff --git a/Android.mk b/Android.mk
index 224a4be..b0606df 100644
--- a/Android.mk
+++ b/Android.mk
@@ -13,6 +13,7 @@
 LOCAL_JAVA_LIBRARIES := javax.obex
 LOCAL_STATIC_JAVA_LIBRARIES := com.android.vcard
 
+LOCAL_REQUIRED_MODULES := libbluetooth_jni bluetooth.default
 
 LOCAL_PROGUARD_ENABLED := disabled