Close the camera when the async open callback runs after pause

Current implementation leaves the camera device open if callback
returns after app is paused, since activity/module pausing is
already complete before the camera opened. This CL adds a close
if the opened callback returns when the activity is already paused.

Bug: 17397753
Change-Id: Iec5d16445201b4e308b16e9237fd98ed8599fddc
1 file changed