Summary: Adding a a react-devtools plugin for Android. This doesn't do much, but announces the plugin to be available. To make this work on remote device, the hostname and port sent to the device needs to be set in the dev tools. This is isn't done yet, so this will only work for simulators. Reviewed By: jknoxville Differential Revision: D12897151 fbshipit-source-id: b874549925c395ff6356f6745b9706b182d544dd