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.)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:e8fb649dd5d7a72a2fb4895594b509ace320af1a)
Merged-In: I85f1ab77b0b2201396b14bce366604258ee71bec
Change-Id: I85f1ab77b0b2201396b14bce366604258ee71bec