Enable a WebP AID to show its animation one time

Bug: 145995037
Test: I3d1032b5605c5b6ea64cee0cda91c2ba2a769da8

As described in https://skia-review.googlesource.com/c/skia/+/259161,
Skia has modified its interpretation of a WebP file's encoded loop
count to match Chromium and the latest WebP intent. This updates to the
new behavior.

Revert "Maintain the legacy behavior for WebP loop count"

This reverts commit c33df657a16fbc23df2b6ec1c38060060cd3608a.

Change-Id: I821744336bab9fd494d6666268c6c95b24b69909
1 file changed