Remove special Android treatment on nav-view snippet
Remove special Android treatment on nav-view snippet

With the improvements made to the bottom tab bar location
on the TabFolder, the snippet navigationview-tabfolder.js does
not require any special treatment on Android.

Change-Id: If3296449be3519d33d2a99c72630f2933518cf28

eclipsesource/tabris-js,eclipsesource/tabris-js,eclipsesource/tabris-js