Don't allow reflection on ViewConfiguration#sHasPermanentMenuKey.

This seems to be used to force action bar to show an overflow
menu.  Perhaps this functionality needs to exist in Toolbar,
but after discussion with the team, we have decided it does not
need to be supported in this fashion any longer.

Bug: 123768915
Test: No API or behavior changes
Change-Id: I8e311133faec599f4dee635e261507521318260e