Show mobile icons with left-to-right in order of slot index

Icon list of status bar is displayed as first items go to the right
of second items. But mobile icon has order of slot index
and these must be shown with left-to-right([Slot1][Slot2]..).
Reverse the sort order in icon list beforehand.

Test: manual - Checked that the SIM-slot1 icon is shown on the left
side of SIM-slot2.
Test: auto - Passed StatusBarIconListTest.
Bug: 123931542

Change-Id: I2d9fcd63e9ef05f96ba4a17de78bb834b71729e8