DO NOT MERGE ANYWHERE: Do nullptr check on source filter

Bug: 189129262
Change-Id: I57bcddb276f1f56d6523499bade6abc6fc7e7732
Merged-In: Id7e89a17480884b5faa63e755b98faf0b9e91365

media/jni/android_media_tv_Tuner.cpp

@@ -3094,7 +3094,7 @@ static jint android_media_tv_Tuner_set_filter_data_source(
         r = iFilterSp->setDataSource(NULL);
     } else {
         sp<IFilter> srcSp = getFilter(env, srcFilter)->getIFilter();
-        if (iFilterSp == NULL) {
+        if (srcSp == NULL) {
             ALOGD("Failed to set filter data source: src filter not found");
             return (jint) Result::INVALID_ARGUMENT;
         }