IMediaSource: add supportReadMultiple().

Bug: 29331573
Change-Id: I7cdff44878bd93671e98fe11c99d17e82410cdcb
diff --git a/media/libmediaplayerservice/nuplayer/GenericSource.cpp b/media/libmediaplayerservice/nuplayer/GenericSource.cpp
index 56042d4..3d836c8 100644
--- a/media/libmediaplayerservice/nuplayer/GenericSource.cpp
+++ b/media/libmediaplayerservice/nuplayer/GenericSource.cpp
@@ -1420,7 +1420,9 @@
         options.setNonBlocking();
     }
 
-    bool couldReadMultiple = (!mIsWidevine && trackType == MEDIA_TRACK_TYPE_AUDIO);
+    bool couldReadMultiple =
+        (!mIsWidevine && trackType == MEDIA_TRACK_TYPE_AUDIO
+                && track->mSource->supportReadMultiple());
     for (size_t numBuffers = 0; numBuffers < maxBuffers; ) {
         Vector<MediaBuffer *> mediaBuffers;
         status_t err = NO_ERROR;