Enable LnbCallback in hidl/aidl default tuner implementation

Bug: 210960436
Test: cts.TunerTest#testLnbAddAndRemoveSharee
Change-Id: I11443144dcd1979afe9b077c446faaa293ccb61c
diff --git a/tv/tuner/1.1/default/Lnb.h b/tv/tuner/1.1/default/Lnb.h
index 70a8e41..b34ca39 100644
--- a/tv/tuner/1.1/default/Lnb.h
+++ b/tv/tuner/1.1/default/Lnb.h
@@ -51,6 +51,7 @@
   private:
     int mId;
     virtual ~Lnb();
+    sp<ILnbCallback> mCallback;
 };
 
 }  // namespace implementation