Add getInterface(Version|Hash) in ILights stub for test

If it is frozen, interface has to implement getInterface(Version|Hash)

Bug: 153501202
Test: m FrameworksServicesTests
Change-Id: Ia9423a7fe524ff225435344b527728ec2646adfc

services/tests/servicestests/src/com/android/server/lights/LightsServiceTest.java

@@ -58,6 +58,16 @@ public class LightsServiceTest {
                 fakeHwLight(105, LightsManager.LIGHT_TYPE_MICROPHONE, 2)
             };
         }
+
+        @Override
+        public int getInterfaceVersion() {
+            return this.VERSION;
+        }
+
+        @Override
+        public String getInterfaceHash() {
+            return this.HASH;
+        }
     };
 
     private static HwLight fakeHwLight(int id, int type, int ordinal) {