Ensure that EdgeBackGestureHandler receives all configuration updates

Bug: 332635834
Flag: NONE
Test: atest NavBarHelperTest
Test: Manual, i.e. verifying that back gesture is working correctly after configuration changes (rotation/folding etc.)
Change-Id: I85f1ab77b0b2201396b14bce366604258ee71bec
(cherry picked from commit e8fb649d)