Implement MediaFilter/MediaEvents core path in Tuner Service

Test: tuner sample tis on cuttlefish
Bug: 159067322
Change-Id: I37b7338e8c7b02bbf562f67da81088d07b2a807f
Merged-In: I37b7338e8c7b02bbf562f67da81088d07b2a807f
diff --git a/services/tuner/TunerDemux.h b/services/tuner/TunerDemux.h
index 675bb7c..594fd66 100644
--- a/services/tuner/TunerDemux.h
+++ b/services/tuner/TunerDemux.h
@@ -47,6 +47,7 @@
     Status openDvr(
         int dvbType, int bufferSize, const shared_ptr<ITunerDvrCallback>& cb,
         shared_ptr<ITunerDvr>* _aidl_return) override;
+    Status close() override;
 
 private:
     sp<IDemux> mDemux;