[RNMobile] Enable Support for 'arm64-v8a' in Android's Gradle Configuration

[SiobhyB]

gutenberg-mobile: wordpress-mobile/gutenberg-mobile#4170

Description

At the moment, anyone running on an M1 Mac who wishes to run Gutenberg's demo app for Android would need to manually add support for arm64-v8a.

With this PR, support is enabled by default, by adding arm64-v8a to abiFilters in the project's Gradle configuration.

How has this been tested?

The demo app still runs as expected on a Mac with an 8-Core Intel Core i9 processor, confirming there are no unexpected regressions for 'non-M1' machines.

This will also need to be tested by someone with a machine that has the M1 chip, to confirm that the demo app runs smoothly for them with no necessary changes to the Gradle configuration.

Types of changes

Non-breaking change to code, to enable support, involving the addition of arm64-v8a to abiFilters in packages/react-native-editor/android/app/build.gradle.

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• I've tested my changes with keyboard and screen readers.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR (please manually search all *.native.js files for terms that need renaming or removal).

[github-actions]

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[SiobhyB]

Requesting reviews from @gwwar as this PR came up following our recent conversations and also @oguzkocer as this involves changes to our Gradle configuration, I want to be certain that this won't cause any issues. Let me know if I can clarify anything! Thanks in advance 🙇‍♀️

[oguzkocer]

Admittedly this is not something I have any prior experience with. Looking at the Android developer docs specifying extra architectures shouldn't cause any issues, although I do wonder if they needed to be specified in the first place, but this is not relevant to this PR.

As long as it works as expected, I think this is good 🤷 I'll leave the testing to @gwwar as I don't have my M1 machine setup to test this right now.

[gwwar]

Nice! Thanks for adding this @SiobhyB Running npm run native android works for me now. I tested this on a MacBook Pro (13-inch, M1, 2020.)

I also didn't need to download the extra Platform S packages, noted in #35529 (comment)

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