[CS] Remove CentralSurfaces from ScreenPinningRequest.

Instead, call NavigationBarController directly. (NavBarController is
injected lazily to avoid a cycle NavBarController ->
OverviewProxyService -> ScreenPinningRequest -> NavBarController. This
is at least better than injecting CentralSurfaces lazily :) )

Bug: 277764509
Test: pin app -> verify screen pinning request UI looks correct, draws 3
button nav in white icons

Change-Id: Ia17eac4c020ed0d19a90681386ed3e7bfca73327