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Changes our cipd hosted android sdk+ndk bundle to no longer modify directory structure from what Android directly provides, allowing AGP to find the ndk automatically and preventing downloading. 1. Changes the `create_cipd_packages.sh` script so we don't move the ndk 2. Uses the new script to upload a [36v4unmodified](https://chrome-infra-packages.appspot.com/p/flutter/android/sdk/all/linux-amd64/+/version:36v4unmodified) bundle 3. Changes DEPS+ci.yaml to reference the new bundle 4. Changes GN build rules accordingly 5. Removes special config in existing build.gradle files to point at the location of the ndk - agp should now know where it is without conig 6. For some tests, passes in an environment variable pointing to the ndk location, to override the environment variable passed by the recipes. This variable is respected by the tool, so the recipes passing it, pointing to the wrong place, is problematic. After this change lands we can stop passing it in the recipes, and then we can remove this special config in the tests. But adding it temporarily allows us to make this change without coordinating a recipes change at the same moment, and probably breaking things out of band. Logs from a random postsubmit run of `Mac build_android_host_app_with_module_aar` on the tree currently: https://logs.chromium.org/logs/flutter/buildbucket/cr-buildbucket/8695664517253382913/+/u/run_build_android_host_app_with_module_aar/stdout We see > [2025-12-12 10:49:49.223087] [STDOUT] stdout: Checking the license for package NDK (Side by side) 28.2.13676358 in /Volumes/Work/s/w/ir/cache/android/sdk/licenses [2025-12-12 10:49:49.223221] [STDOUT] stdout: License for package NDK (Side by side) 28.2.13676358 accepted. [2025-12-12 10:49:49.223268] [STDOUT] stdout: Preparing "Install NDK (Side by side) 28.2.13676358 v.28.2.13676358". [2025-12-12 10:50:14.093824] [STDOUT] stdout: "Install NDK (Side by side) 28.2.13676358 v.28.2.13676358" ready. [2025-12-12 10:50:14.093909] [STDOUT] stdout: Installing NDK (Side by side) 28.2.13676358 in /Volumes/Work/s/w/ir/cache/android/sdk/ndk/28.2.13676358 [2025-12-12 10:50:14.093947] [STDOUT] stdout: "Install NDK (Side by side) 28.2.13676358 v.28.2.13676358" complete. [2025-12-12 10:50:14.410724] [STDOUT] stdout: "Install NDK (Side by side) 28.2.13676358 v.28.2.13676358" finished. Example of no longer downloading: Logs from a presubmit run: https://logs.chromium.org/logs/flutter/buildbucket/cr-buildbucket/8695732180931529361/+/u/run_build_android_host_app_with_module_aar/stdout We don't see these logs. We still see android build tools downloading - we can probably tackle that in another pr. ## Pre-launch Checklist - [ ] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [ ] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [ ] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [ ] I signed the [CLA]. - [ ] I listed at least one issue that this PR fixes in the description above. - [ ] I updated/added relevant documentation (doc comments with `///`). - [ ] I added new tests to check the change I am making, or this PR is [test-exempt]. - [ ] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [ ] All existing and new tests are passing. 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If you find its comments useful you can update your code accordingly, but if you are unsure or disagree with the feedback, please feel free to wait for a Flutter team member's review for guidance on which automated comments should be addressed. <!-- Links --> [Contributor Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#overview [Tree Hygiene]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md [test-exempt]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#tests [Flutter Style Guide]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md [Features we expect every widget to implement]: https://github.com/flutter/flutter/blob/main/docs/contributing/Style-guide-for-Flutter-repo.md#features-we-expect-every-widget-to-implement [CLA]: https://cla.developers.google.com/ [flutter/tests]: https://github.com/flutter/tests [breaking change policy]: https://github.com/flutter/flutter/blob/main/docs/contributing/Tree-hygiene.md#handling-breaking-changes [Discord]: https://github.com/flutter/flutter/blob/main/docs/contributing/Chat.md [Data Driven Fixes]: https://github.com/flutter/flutter/blob/main/docs/contributing/Data-driven-Fixes.md --------- Co-authored-by: DoLT <dolt@guide.inc> Co-authored-by: Gray Mackall <mackall@google.com> Co-authored-by: John "codefu" McDole <john@mcdole.org>