spinner: reads GRID_UNIT_PX and NATIVE_ORIENTATION from deviceinfo
As we migrate more settings to deviceinfo, we starts to have ports which no longer configure ubuntu-touch-session.d and provide GRID_UNIT_PX and NATIVE_ORIENTATION solely through deviceinfo. This led to incorrect settings in (and only in) spinner.
So we decided to continue this trend and move lomiri-system-compositor's spinner to use deviceinfo too.
Fixes: #16 (closed)
Edited by Ratchanan Srirattanamet