Revert "hide deprecated underline and strikethru"

Revert "hide deprecated underline and strikethru"

This reverts commit a01bf9ab748836fc4bf271bd5024151bf1ce2e88.

Reason for revert: Breaking Android merge. They access setUnderlineText on their <shudder> subclass of SkPaint.

Original change's description:
> hide deprecated underline and strikethru
>
> BUG=skia:6250
>
> Change-Id: I85395e4960b16ab91237a74ff35e5b7588965512
> Reviewed-on: https://skia-review.googlesource.com/8600
> Reviewed-by: Ben Wagner <bungeman@google.com>
> Commit-Queue: Mike Reed <reed@google.com>
>

TBR=bungeman@google.com,reed@google.com,reviews@skia.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:6250

Change-Id: If55f69f061dc4439ca2faa62807a9c5694ebbeb4
Reviewed-on: https://skia-review.googlesource.com/8687
Reviewed-by: Leon Scroggins <scroggo@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>