Add OWNERS file for the annotations package

Change-Id: I7d4aee38ac79aea239d0d208ed0abba7174a9101
diff --git a/core/java/android/annotation/OWNERS b/core/java/android/annotation/OWNERS
new file mode 100644
index 0000000..d6bb71b
--- /dev/null
+++ b/core/java/android/annotation/OWNERS
@@ -0,0 +1 @@
+tnorbye@google.com