Roll ANGLE from 156c227d6cf2 to a481bee281b1 (3 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/156c227d6cf2..a481bee281b1

2020-11-06 courtneygo@google.com Add GetEnvironmentVarOrUnCachedAndroidProperty
2020-11-06 jmadill@chromium.org Perf Tests: Fix test time with max steps performed.
2020-11-06 cnorthrop@google.com Tests: Add Clash of Clans trace

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 courtneygo@google.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: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-asan;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: courtneygo@google.com
Test: Test: angle_perftests --gtest_filter="*clash_of_clans*"
Change-Id: I6c69e685d58ede515ad891aedaae772a768c2101
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2523806Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#825143}

DEPS

@@ -218,7 +218,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling ANGLE
   # and whatever else without interference from each other.
-  'angle_revision': '156c227d6cf2e09e2450d01ed45fc281494aa4ed',
+  'angle_revision': 'a481bee281b16c9d16b1c7d2393a4e169514ac39',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.