VCL: Remove unnecessary headers from outdev/bitmap.cxx

Change-Id: Ib4d5da9bb36e6ad7a02536f169ae7b634bb939db
VCL: Remove unnecessary headers from outdev/clipping.cxx

Change-Id: Idee24d0d5ec25082ed1be48bee6051f132e00a97
VCL: Remove unnecessary headers from outdev/curvedshapes.cxx

Change-Id: Iae98ff3b75dce83a7d05176b6a0bdf93b7e5fb00
VCL: Remove unnecessary headers from outdev/font.cxx

Change-Id: I45c811b9f7c5c10fcefe0e2da809bdc5cc381de1
VCL: Remove unnecessary headers from outdev/map.cxx

Change-Id: Idd1bc7f640fb62265f453b5a201b052bbbc14b77
VCL: Remove unnecessary headers from outdev/mask.cxx

Change-Id: Id759b151bb636aa7c79043854a622a88a544138d