Implement getInterfaceHash/Version (health)

As these interfaces get frozen, java services
implementing the interfaces are required to implement getInterfaceHash
and getInterfaceVersion [1]

[1]
https://source.android.com/devices/architecture/aidl/stable-aidl#new-meta-interface-methods

Bug: 190577319
Test: m
Change-Id: I01dda85890dae59082067e4b38c0f50d493cd22d

services/core/java/com/android/server/health/HealthRegCallbackAidl.java

@@ -115,5 +115,13 @@ public class HealthRegCallbackAidl {
         public void healthInfoChanged(HealthInfo healthInfo) throws RemoteException {
             mServiceInfoCallback.update(healthInfo);
         }
+        @Override
+        public String getInterfaceHash() {
+            return IHealthInfoCallback.HASH;
+        }
+        @Override
+        public int getInterfaceVersion() {
+            return IHealthInfoCallback.VERSION;
+        }
     }
 }