[tool] New project gitignore still defines rules for Android and iOS folder, instead of placing them in the Android/iOS gitignore file #154163
Description
Use case
Users creating a new Flutter project that want to benefit from the starting gitignore.
Proposal
Currently when creating a new Flutter project, most of the Android & iOS specific things are split off into their own gitignores in the Android & iOS directories.
However, this isn't the case for all the rules.
For iOS, we still define **/ios/Flutter/.last_build_id in the root gitignore at https://github.com/flutter/flutter/blob/master/packages/flutter_tools/templates/app_shared/.gitignore.tmpl#L28
For Android, we still define
/android/app/debug
/android/app/profile
/android/app/release
at the bottom of the same template.
We should probably move these gitignore lines into their Android / iOS specific counterparts.
Steps to reproduce:
flutter create samplecd sample && cat .gitignore- The
iosandandroidfolders are still present in rules in that file
Question: I'm not sure if the **/ glob pattern is for add-to-app use cases?
Flutter Doctor
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