Set up Maven distribution for new plugins

Summary:
Setting up the necessary metadata to publish the separate plugins
to Maven/Bintray.

Reviewed By: danielbuechele

Differential Revision: D17480263

fbshipit-source-id: 1772cee5b3744ce52fc6e2510a27cb7f500e72bf

android/plugins/network/build.gradle

@@ -23,3 +23,5 @@ android {
         compileOnly deps.jsr305
     }
 }
+
+apply from: rootProject.file('gradle/release.gradle')