remove fmq reference when dvr and filter are closed.

bug: 182546718
Test: manaul
Change-Id: Iea28f07a0800cbab88a1348fa7ae21ac17e1cfd8

media/jni/tuner/DvrClient.cpp

@@ -314,6 +314,11 @@ Result DvrClient::flush() {
 }
 
 Result DvrClient::close() {
+    if (mDvrMQEventFlag != NULL) {
+        EventFlag::deleteEventFlag(&mDvrMQEventFlag);
+    }
+    mDvrMQ = NULL;
+
     if (mTunerDvr != NULL) {
         Status s = mTunerDvr->close();
         mTunerDvr = NULL;

media/jni/tuner/FilterClient.cpp

@@ -259,6 +259,11 @@ Result FilterClient::setDataSource(sp<FilterClient> filterClient){
 }
 
 Result FilterClient::close() {
+    if (mFilterMQEventFlag != NULL) {
+        EventFlag::deleteEventFlag(&mFilterMQEventFlag);
+    }
+    mFilterMQ = NULL;
+
     if (mTunerFilter != NULL) {
         Status s = mTunerFilter->close();
         closeAvSharedMemory();