Allow FLAG_SHOW_WHEN_LOCKED to apply to dialogs

Previous fix to keep non-show-when-locked windows hid dialogs from
activities that had asked to be show-when-locked. That was too
restrictive.

Fixes bug 13225149.

Change-Id: I39ae9d7cbcc9b5109257f732d027bda3a2de65e4
1 file changed