Linux_android flutter_gallery__transition_perf_hybrid is 2.99% flaky

[flutterflakybot]

The post-submit test builder Linux_android flutter_gallery__transition_perf_hybrid had a flaky ratio 2.99% 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_android%20flutter_gallery__transition_perf_hybrid/4
Commit: flutter@bdca339
Flaky builds:
https://ci.chromium.org/ui/p/flutter/builders/prod/Linux_android%20flutter_gallery__transition_perf_hybrid/4
https://ci.chromium.org/ui/p/flutter/builders/prod/Linux_android%20flutter_gallery__transition_perf_hybrid/3

Succeeded builds (3 most recent):
https://ci.chromium.org/ui/p/flutter/builders/prod/Linux_android%20flutter_gallery__transition_perf_hybrid/9
https://ci.chromium.org/ui/p/flutter/builders/prod/Linux_android%20flutter_gallery__transition_perf_hybrid/8
https://ci.chromium.org/ui/p/flutter/builders/prod/Linux_android%20flutter_gallery__transition_perf_hybrid/7

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).