macOS host engine tests are flaky since #162944 #163104
Description
Most likely caused by #162944.
- https://cr-buildbucket.appspot.com/build/8723181849859182753
- https://cr-buildbucket.appspot.com/build/8723176950490576929
- https://cr-buildbucket.appspot.com/build/8723174345367128385
The failures are not the same::
[2/214] EmbedderTest.CanSpecifyCustomUITaskRunner (162 ms)
[INFO:flutter/testing/test_timeout_listener.cc(75)] Test timeout of 300 seconds per test case will be enforced.
�[0;33mNote: Google Test filter = EmbedderTest.CanSpecifyCustomUITaskRunner
�[m�[0;32m[==========] �[mRunning 1 test from 1 test suite.
�[0;32m[----------] �[mGlobal test environment set-up.
�[0;32m[----------] �[m1 test from EmbedderTest
�[0;32m[ RUN ] �[mEmbedderTest.CanSpecifyCustomUITaskRunner
[2/214] EmbedderTest.CanSpecifyCustomUITaskRunner returned/aborted with exit code -11 (162 ms)INTERRUPTED TESTS (1/108):
Interrupted: /Volumes/Work/s/w/ir/cache/builder/engine/src/out/ci/host_debug_unopt_arm64/ui_unittests ShellTest.EncodeImageRetryOverflows (try #2)If there is a quick fix that we can verify locally, let's do it, otherwise I'd prefer a revert and we can re-land with stable[r] tests.