Change BumpPointerSpace main block header to not be in space data.

Changed the bump pointer space main block to be in the space and not
the space data. This lets us access the main block header when the
space is protected and lets us walk a protected space as long as it
is empty.

Bug: 12966354
Change-Id: Id53bf59224926718af7356dd9fc1205ff91cc5d1
2 files changed