am 6b72e9b3: When keyguard is active, only allow the status bar to be opened if it is insecure and covered by another window.

Merge commit '6b72e9b39642fdff5aef74cd7df2fbd00b9f2257' into eclair-mr2-plus-aosp

* commit '6b72e9b39642fdff5aef74cd7df2fbd00b9f2257':
  When keyguard is active, only allow the status bar to be opened if it is insecure and covered by another window.