Roll Fuchsia SDK from 4.20210504.1.1 to 4.20210504.3.1

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/fuchsia-sdk-chromium-autoroll
Please CC chrome-fuchsia-gardener@grotations.appspotmail.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/master/autoroll/README.md

Cq-Include-Trybots: luci.chromium.try:fuchsia-arm64-cast;luci.chromium.try:fuchsia-deterministic-dbg;luci.chromium.try:fuchsia-x64-cast
Tbr: chrome-fuchsia-gardener@grotations.appspotmail.com
Disable-Retries: true
Change-Id: Ife925d6082d3effbbd7c7accefd63da446380e53
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2873067
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Bot-Commit: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#879169}

build/fuchsia/linux.sdk.sha1

@@ -1 +1 @@
-4.20210504.1.1
+4.20210504.3.1

build/fuchsia/mac.sdk.sha1

@@ -1 +1 @@
-4.20210504.0.1
+4.20210504.3.1