ShellTest.DiscardLayerTreeOnResize is flaky on presubmits. #95751
Description
An instance of the failure is here. The assertion failure is:
[ RUN ] ShellTest.DiscardLayerTreeOnResize
../../flutter/shell/common/shell_unittests.cc:2373: Failure
Expected equality of these values:
1
external_view_embedder->GetSubmittedFrameCount()
Which is: 2
[FATAL:flutter/fml/memory/weak_ptr.h(253)] Check failed: (checker_.checker).IsCreationThreadCurrent().
[ERROR:flutter/fml/backtrace.cc(116)] Caught signal SIGABRT during program execution.
Frame 0: 0x7fa680ecf42a abort
The test passed on re-run.