Added support for Sony SmartWatch

Hi folks,

I have added preliminary support for Sony SmartWatch, it still has some bugs but is usable.

You can download a test APK here: https://github.com/cepr/android-xbmcremote/downloads

Supported features:
- Display of the playing media on the watch
- Single touch to Play/Pause
- Swipe left to go backward by 30 seconds
- Swipe right to go forward by 30 seconds
- Swipe up to play previous media of the playlist
- Swipe down to play the next media of the playlist

Code is available here https://github.com/cepr/android-xbmcremo...d5e0d99ed8
In order to build the project, you will need to download and import the Smart Extension SDK from http://developer.sonymobile.com/download...nsion-sdk/.

Enjoy!