Bitmap adaptor patch 1 of 1 - Replace all uses of the Bitmap class with new simpler...

Bitmap adaptor patch 1 of 1 - Replace all uses of the Bitmap class with new simpler type ImageData in core / adaptor communication

[Issue#] N/A

[Problem]
Bitmap is too complex for the job of shipping pixels across the Core /
Adaptor boundary.

[Cause]
Legacy implementation.

[Solution]
Replace uses of Bitmap with uses of the new class ImageData.

[Notes]

This is mutually dependent with a core patch:
  http://slp-info.sec.samsung.net/gerrit/#/c/450629/

Toolkit TCT tests are fixed by this patch:
   http://slp-info.sec.samsung.net/gerrit/#/c/477139/

Signed-off-by: Andrew Cox <andrew.cox@partner.samsung.com>
Change-Id: I3250db02ef84581e34512a0847d43755068f8618