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Fix SupportingPaneScaffold state sync on config changes

Updated rememberThreePaneScaffoldNavigator method to sync navigator scaffoldState when layout directives change.

Bug: 533442526
Test: manual
Change-Id: I7ce19a7577e4c8245f7ff2fca99ef0db0a1e777b
A
aplachykau committed
e295964345f14d9fa353da77bf1e9a6d21549a82
Parent: 6f685bd