Add MEDIA_STARTED/PAUSED/STOPPED events to media players

This is needed for the MediaTimeProvider java interface, so it does not
continually poll for current media time.

Note: NuPlayer and AwesomePlayer do not correctly handle stop (pause
instead), so for those we will signal PAUSED.

Signed-off-by: Lajos Molnar <lajos@google.com>
Change-Id: I3c61e1bda475f131323f475c18a42e3ec66c9ae1
Bug: 10326117
diff --git a/media/libmediaplayerservice/nuplayer/NuPlayer.cpp b/media/libmediaplayerservice/nuplayer/NuPlayer.cpp
index 7e81035..b411f34 100644
--- a/media/libmediaplayerservice/nuplayer/NuPlayer.cpp
+++ b/media/libmediaplayerservice/nuplayer/NuPlayer.cpp
@@ -731,6 +731,9 @@
                 ALOGV("renderer %s flush completed.", audio ? "audio" : "video");
             } else if (what == Renderer::kWhatVideoRenderingStart) {
                 notifyListener(MEDIA_INFO, MEDIA_INFO_RENDERING_START, 0);
+            } else if (what == Renderer::kWhatMediaRenderingStart) {
+                ALOGV("media rendering started");
+                notifyListener(MEDIA_STARTED, 0, 0);
             }
             break;
         }