Fix touch event parameter order

The issue is so obvious... However, all newer Android devices (e.g.,
Nexus 6P, 5X, 9) are immune to this bug. So I didn't notice this until I
tested Viewer app on Nexus 7 yesterday...

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2254223002

Review-Url: https://codereview.chromium.org/2254223002
1 file changed