Applied TYPE_ACCESSIBILITY_MAGNIFICATION_OVERLAY in WindowState

Add WindowType, TYPE_ACCESSIBILITY_MAGNIFICATION_OVERLAY, supported in WindowState.
1. b/147799487
   TYPE_ACCESSIBILITY_MAGNIFICATION_OVERLAY can be shown for all users
   after switching to another user.
2. b/150568357
   TYPE_ACCESSIBILITY_MAGNIFICATION_OVERLAY should be excluded from
   magnified window as well as TYPE_MAGNIFICATION_OVERLAY

Bug: 147799487
Bug: 150568357
Test: atest WmTests:WindowStateTests
Change-Id: I0668c14714d783e3a0653cc42239685cecd33422