Reset the frozen recents list state when switching to button navigation

- A quickswitch will freeze the spatial order of the recents list
  (to allow quickswitching back), but if a nav mode change happens
  immediately after, then the recents list will continue to be
  frozen leaving the list in the wrong order (which can cause a
  flake or failure)

Bug: 298544839
Test: atest NexusLauncherTests:com.android.quickstep.TaplTestsQuickstep
Change-Id: Iabac305ea12cf4a2eb704802a315b6feba49f88a