Share Android Studio settings.

- AndroidStudioの設定ファイルのうち、共有すべきものを追加。
- AndroidStudioの設定ファイル共有のために.gitignoreを修正
Add a sample of uiautomator project
Remove uiautomator from the main project's dependencies.
Add new build environments to README.md
Add a eclipse config files to gitignore.
Set longer timeout value of clickAndWaitForWindow() for running on slow emulators.
Remove unused build.gradle