Rename CentralSurfacesInt back to CentralSurfaces.

Necessary step to retain git history of CentralSurfacesImpl.

Bug: 229228871
Test: manual
Change-Id: If4152279970090eeb3ea34307dfade5873e9dbf3
Merged-In: If4152279970090eeb3ea34307dfade5873e9dbf3
94 files changed