Revert of Clear stencil buffer before using it for drawing (patchset #2 id:20001 of https://codereview.chromium.org/2342873004/ )

Reason for revert:
performance regression in Android macrobench tests

Original issue's description:
> Clear stencil buffer before using it for drawing
>
> Clear stencil buffer before using it for drawing. This is
> resolving an issue with a failing android CTS test in drawArc.
> GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2342873004
>
> Committed: https://skia.googlesource.com/skia/+/c326a383e1069497884905f9dd3e720e17d8fcb5

TBR=bsalomon@google.com,reed@google.com
# Not skipping CQ checks because original CL landed more than 1 days ago.

Review-Url: https://codereview.chromium.org/2355923002
1 file changed