Jim Miller 4ae8cb9e73 Fix 5044158: Reduce overall memory footprint of lockscreen
On devices that do not require showing lock before unlock, we now only create
just the unlock screen.  In addition to simplifying the code, this also
prevents keeping around a potentially unusued lock screen and saves ~1MB
in the system process on devices with only a secure lockscreen.

Change-Id: I533f2692b44a7991d4850cecc874c76166e7ce71
2011-08-29 16:02:24 -07:00
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