Add mediadrm service

Part of media security hardening

This is an intermediate step toward moving
mediadrm to a new service separate from mediaserver.
This first step allows mediadrmservice to run based
on the system property media.mediadrmservice.enable
so it can be selectively enabled on devices that
support using native_handles for secure buffers.

bug: 22990512
Change-Id: I70320f0c4b7861cdba26fbc24c20bce54e5749a4
diff --git a/media/libmedia/Android.mk b/media/libmedia/Android.mk
index c095724..479ccbb 100644
--- a/media/libmedia/Android.mk
+++ b/media/libmedia/Android.mk
@@ -31,6 +31,7 @@
     mediaplayer.cpp \
     IMediaCodecList.cpp \
     IMediaCodecService.cpp \
+    IMediaDrmService.cpp \
     IMediaHTTPConnection.cpp \
     IMediaHTTPService.cpp \
     IMediaLogService.cpp \