MediaTranscodingService: Add AIDL interface for MediaTranscodingService.

There are a lot of TODOs now in the code and they will be addressed
in the next few CLs. .

Bug: 145233472
Test: Build and Compile

Change-Id: I27d96b18ebca6f07bc24e4124fb48b0e79d387d2
diff --git a/media/libmediatranscoding/OWNERS b/media/libmediatranscoding/OWNERS
new file mode 100644
index 0000000..02287cb
--- /dev/null
+++ b/media/libmediatranscoding/OWNERS
@@ -0,0 +1,3 @@
+akersten@google.com
+hkuang@google.com
+lnilsson@google.com