Updating makefiles for hidl_interface.

Bug: 64487114
Test: manual
Merged-In: Ie13d9e014cf2b81c18c67f551b4644fb9f0ba812
Change-Id: Ie13d9e014cf2b81c18c67f551b4644fb9f0ba812
diff --git a/Android.bp b/Android.bp
index 7ae00b6..978559a 100644
--- a/Android.bp
+++ b/Android.bp
@@ -2,6 +2,11 @@
     "*"
 ]
 
+hidl_package_root {
+    name: "android.hardware",
+    path: "hardware/interfaces",
+}
+
 cc_defaults {
     name: "hidl_defaults",
     cflags: [