Roll ANGLE from 394fb0d34213 to 3eb2bcf77b68 (3 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/394fb0d34213..3eb2bcf77b68

2022-04-29 syoussefi@chromium.org Vulkan: Fix syncval errors with DONT_CARE for unused attachments
2022-04-29 angle-autoroll@skia-public.iam.gserviceaccount.com Roll Chromium from 1e97e6cd1c3c to 3a1ff9044aec (639 revisions)
2022-04-29 brianosman@google.com Add option for Metal output to angle_shader_translator

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

To file a bug in ANGLE: https://bugs.chromium.org/p/angleproject/issues/entry
To file a bug in Chromium: https://bugs.chromium.org/p/chromium/issues/entry

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/main/autoroll/README.md

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel;luci.chromium.try:linux-swangle-try-x64;luci.chromium.try:win-swangle-try-x86
Bug: None
Tbr: cnorthrop@google.com
Change-Id: I79fb5065758528016324d14a5ecc71665a78392d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3617276
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/main@{#998001}