Update snapshot of FileTransfer.java to

cordova-plugin-file-transfer@9d2246e85c7f4b002218e6d231c0d452a9650cf7
Update snapshot of CameraLauncher.java to cordova-plugin-camera@703f6c68d830d41f9de56c4da57dfbc9aef03556
Update InAppBrowser.java to cordova-plugin-inappbrowser@aa81c3267a5b1c337b09933ff5ceb06a93f9dbb7
Update JS snapshot and VERSION to 2.9.1-dev
[CB-4817] Remove unused assets in project template.
Move java files back into api/ directory.

They were moved out by the cherry-picks.