MediaPlayer: add notifyAt at native side

Test: media time is correct when playback rate is not 1.0
Bug: 65204641
Change-Id: Ie9f67e3cb37267cfd364c9a9b9f674232b68ef27
diff --git a/media/libmediaplayerservice/nuplayer/NuPlayerDriver.h b/media/libmediaplayerservice/nuplayer/NuPlayerDriver.h
index b797ca1..666359a 100644
--- a/media/libmediaplayerservice/nuplayer/NuPlayerDriver.h
+++ b/media/libmediaplayerservice/nuplayer/NuPlayerDriver.h
@@ -65,6 +65,7 @@
     virtual status_t getCurrentPosition(int *msec);
     virtual status_t getDuration(int *msec);
     virtual status_t reset();
+    virtual status_t notifyAt(int64_t mediaTimeUs) override;
     virtual status_t setLooping(int loop);
     virtual player_type playerType();
     virtual status_t invoke(const Parcel &request, Parcel *reply);