Linux cubic_bezier_perf__e2e_summary is 2.60% flaky

[flutterflakybot]

The post-submit test builder Linux cubic_bezier_perf__e2e_summary had a flaky ratio 2.60% for the past 15 days, which is above our 2.00% threshold.

One recent flaky example for a same commit: https://ci.chromium.org/ui/p/flutter/builders/prod/Linux%20cubic_bezier_perf__e2e_summary/2184
Commit: flutter@960463e
Flaky builds:
https://ci.chromium.org/ui/p/flutter/builders/prod/Linux%20cubic_bezier_perf__e2e_summary/2189
https://ci.chromium.org/ui/p/flutter/builders/prod/Linux%20cubic_bezier_perf__e2e_summary/2184

Succeeded builds (3 most recent):
https://ci.chromium.org/ui/p/flutter/builders/prod/Linux%20cubic_bezier_perf__e2e_summary/2209
https://ci.chromium.org/ui/p/flutter/builders/prod/Linux%20cubic_bezier_perf__e2e_summary/2208
https://ci.chromium.org/ui/p/flutter/builders/prod/Linux%20cubic_bezier_perf__e2e_summary/2207

Please follow https://github.com/flutter/flutter/wiki/Reducing-Test-Flakiness#fixing-flaky-tests to fix the flakiness and enable the test back after validating the fix (internal dashboard to validate: go/flutter_test_flakiness).