SF: Forward declare RefreshRateConfigs in SurfaceFlingerFactory.h

There was an error including SurfaceFlingerFactory.h from code that
should not care about the scheduler.

Test: atest libsurfaceflinger_unittest libcompositionengine_test
Test: go/wm-smoke
Bug: 121291683
Change-Id: I1bb618b4926de4748d06dcae75618a4f079cabcd
1 file changed