| This class controls which MIDlet's display is in the foreground.
Running only in the AMS Isolate (0) the controller consulted by the MIDlet
proxy list for any foreground when various state changes occur in a MIDlet.
The display controller automatically selects the next foreground if
needed.
From the user perspective when the last MIDlet the user launched is created,
that MIDlet should automatically get the foreground (see the midletCreated
and foregroundRequest methods).
A MIDlet that is paused or destroyed is treated as if it has requested the
background as described above.
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