[CFL] Avoid Padding Multiple times
[CFL] Avoid Padding Multiple times

The buffer width and height are updated after adding to padding data to
the CfL buffer. This way, padding is not repeated. This change does not
alter the bitstream

Change-Id: I7e709fc4e18b03a516b1345099b334c9d33d71aa

GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom