MediaDataSource: add getFlags()

Bug: 26533748
Change-Id: I980b833da47b54d94ecc5fedbd75ce69e59925fb

media/jni/android_media_MediaDataSource.cpp

@@ -150,4 +150,8 @@ void JMediaDataSource::close() {
     mJavaObjStatus = UNKNOWN_ERROR;
 }
 
+uint32_t JMediaDataSource::getFlags() {
+    return 0;
+}
+
 }  // namespace android

media/jni/android_media_MediaDataSource.h

@@ -45,6 +45,7 @@ public:
     virtual ssize_t readAt(off64_t offset, size_t size);
     virtual status_t getSize(off64_t* size);
     virtual void close();
+    virtual uint32_t getFlags();
 
 private:
     // Protect all member variables with mLock because this object will be