Add owner field to android.hardware.tests.extension.vibrator

This will prevent the interface from being updated with aidl-freeze-api.
As the interface is for testing purpose, we really don't need to keep
the latest ToT version and the latest stable version to be the same.
Exempt that by adding the owner field to the interface.

Bug: 188713899
Test: m

Change-Id: I9a670f763c8f31f7c847f8ba8d4706efa075285e

tests/extension/vibrator/aidl/Android.bp

@@ -24,6 +24,9 @@ aidl_interface {
     // This is agreeing to keep the interface stable.
     stability: "vintf",
 
+    // This is a testing-purpose interface. Fine to use unstable version on REL platform.
+    owner: "test",
+
     // This happens to use types from a core interface, so we import it, but
     // this won't always be needed.
     imports: [