Add developers stanza to Volley POM. (#400)
Add developers stanza to Volley POM. (#400)

Based on the ZetaSketch project:
https://github.com/google/zetasketch/blob/93f3b8974acc1ef4cb470b91645f921436a830e7/build.gradle#L148
which is published to Maven Central.

See #394
google/volley,google/volley