[Trac #1425] Verify that camera activities close the camera device when not in use.

[Zarro Boogs per Child]

#1425: Verify that camera activities close the camera device when not in use.
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 Reporter:  jg      |       Owner:  cjb    
     Type:  task    |      Status:  new    
 Priority:  high    |   Milestone:  BTest-4
Component:  distro  |    Keywords:  power  
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 The camera activity, Etoys, and any other camera activity should close the
 camera device when idle, or when they are not the visible activity on the
 screen.

 This is to ensure no interference between activities, along with
 minimizing power usage.

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Ticket URL: <http://dev.laptop.org/ticket/1425>
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