Fix issue #8325007: EyeEm app crashes on launch- NPE at...

...android.view.ViewGroup.measureChildWithMargins

The app is doing grungy stuff with trying to insert its own
views inside the window decor.  This new custom layout of the
action bar was assuming it would get fitSystemWindows() called
at which point it would retrieve all of its child views...  but
with the app doing this, it blocks the call down to
fitSystemWindows() and breaks us.  So we now make the layout
manager more robust and ensure it has retrieved its children
when measuring.

Also fix an issue where the xlarge layouts were not updated.

Change-Id: I6c69f26f26b59a6aa8fa1e5788288ffce0b490ca