Added extra functionality for Android users by take advantage of the menu button.
Added the functionality for Android users to add devices using the menu button.

* BUG FIXES *
The getPlatforms method wouldn't empty the array before searching for new platforms. This led to duplicate values in the array list.
The action listeners within the scannerFile.js file would be called multiple times because of the openScanner method. Moving the action listeners out of the openScanner method fixed a lot of timing issues.
iOS users couldn't see the navigation buttons. Hopefully this fixes the issue. I wouldn't know myself as I don't have the right environment set up for iOS testing.