WIP: MediaDrm NDK APIs

Change-Id: I3ac08a3b027135c3fd2a9e95c5e8b3fd722df019
TODO: hooking up event handler, testing
diff --git a/media/ndk/Android.mk b/media/ndk/Android.mk
index 03f26a0..1f155f3 100644
--- a/media/ndk/Android.mk
+++ b/media/ndk/Android.mk
@@ -26,6 +26,7 @@
                   NdkMediaExtractor.cpp                 \
                   NdkMediaFormat.cpp                    \
                   NdkMediaMuxer.cpp                     \
+                  NdkMediaDrm.cpp                       \
 
 LOCAL_MODULE:= libmediandk
 
@@ -42,6 +43,7 @@
     liblog \
     libutils \
     libandroid_runtime \
+    libbinder \
 
 include $(BUILD_SHARED_LIBRARY)