Gray Mackall 0198afa1a4
Reland "Remove dual_screen from new_gallery integration test" (#150873)
Relands https://github.com/flutter/flutter/pull/150808

The original version of the pr [accidentally deleted the back button](https://github.com/flutter/flutter/pull/150808#discussion_r1655444210), which didn't block the app building but made the test hang because it couldn't back out of the demo pages.

Repro-ed the failure, and then tested that 
```
new_gallery_opengles_impeller__transition_perf
new_gallery__transition_perf
new_gallery_impeller_old_zoom__transition_perf
new_gallery__crane_perf
new_gallery_impeller__transition_perf
```

All pass on my pixel 7 pro, with ` dart bin/test_runner.dart test -t <test>`, after re-adding the mistakenly deleted content.

Did not test on an iOS device (I don't have one), but those tests were failing for the same reason from what I can tell:
```
> reply@study
[2024-06-26 12:49:21.884543] [STDOUT] stdout: [        ] scrolling to demo
[2024-06-26 12:49:22.412479] [STDOUT] stdout: [ +527 ms] tapping demo
[2024-06-26 12:49:28.075978] [STDOUT] stderr: [+5663 ms] VMServiceFlutterDriver: tap message is taking a long time to complete...
```
Which is the same error, and which makes sense - they got stuck because they couldn't back out of the page.

Sorry for the churn 🙏
2024-06-26 23:37:55 +00:00
..
2024-04-22 16:49:19 +00:00

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