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Migrate helloworld to use {usesCleartextTraffic} manifest placeholder #52647

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Summary:
This removes the need to specify 2 Manifests for apps and we can just use the main manifes to toggle if usesCleartextTraffic should be enabled or not.

This will have to be replicated in the template repository.

Changelog:
[Android] [Added] - Add support to specify a single Manifest rather than 2 (main/debug) by using the usesCleartextTraffic manifest placeholder which is autoconfigured by RNGP.

Differential Revision: D78425139

…facebook#52620)

Summary:
This creates a `debugOptimized` build type for React Native Android, meaning that we can run C++ optimization on the debug build, while still having the debugger enabled. This is aimed at improving the developer experience for folks developing on low-end devices or emulators.

Users that intend to debug can still use the `debug` variant where the full debug symbols are shipped.

## Changelog:

[ANDROID] [ADDED] - Create a debugOptimized buildType for Android

Pull Request resolved: facebook#52620

Test Plan:
Tested locally with RNTester by doing:

```
./gradlew installDebugOptimized
```

This is the output of the 3 generated .aar. The size difference is a proof that we're correctly stripping out the C++ debug symbols:

<img width="193" height="54" alt="Screenshot 2025-07-15 at 17 49 50" src="https://github.com/user-attachments/assets/584a0e8d-2d17-40d4-ac29-da09049d6554" />
<img width="235" height="51" alt="Screenshot 2025-07-15 at 17 49 39" src="https://github.com/user-attachments/assets/eda8f9e7-3509-4334-8c16-990e55caa04d" />
<img width="184" height="52" alt="Screenshot 2025-07-15 at 17 49 32" src="https://github.com/user-attachments/assets/a5c94385-bc00-4484-b43e-088ee039827f" />

Differential Revision: D78351347

Reviewed By: cipolleschi

Pulled By: cipolleschi
Summary:
This removes the need to specify 2 Manifests for apps and we can just use the `main` manifes to toggle if `usesCleartextTraffic` should be enabled or not.

This will have to be replicated in the template repository.

Changelog:
[Android] [Added] - Add support to specify a single Manifest rather than 2 (main/debug) by using the `usesCleartextTraffic` manifest placeholder which is autoconfigured by RNGP.

Differential Revision: D78425139
@meta-cla meta-cla bot added the CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. label Jul 16, 2025
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This pull request was exported from Phabricator. Differential Revision: D78425139

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