Update SkBitmap::validate to respect Android flag.

Without this change, an SkBitmap with hardware mip will assert in
validate.

R=djsollen@google.com

Review URL: https://codereview.chromium.org/16870002

git-svn-id: http://skia.googlecode.com/svn/trunk@9614 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed