NDK: add more owners for AImage/AImageReader

Change-Id: If9749aec4cb4c21f66b44c0e072c370e1191087a
diff --git a/media/ndk/OWNERS b/media/ndk/OWNERS
index 43e4bb3..11e8340 100644
--- a/media/ndk/OWNERS
+++ b/media/ndk/OWNERS
@@ -1 +1,5 @@
 marcone@google.com
+# For AImage/AImageReader
+etalvala@google.com
+yinchiayeh@google.com
+zhijunhe@google.com