chore(android): enable flexible page sizes

[seyedmostafahasani]

PR Description

This PR adds support for 16 KB memory page size on Android 15+ devices.
To achieve this, the build.gradle file was updated to enable flexible page size support in the native build process by passing the following argument to CMake:

externalNativeBuild { cmake { arguments "-DANDROID_SUPPORT_FLEXIBLE_PAGE_SIZES=ON" } } 

This ensures the React Native app can run correctly on newer Android devices that ship with a 16 KB page size by default.

How to test?

1. Build and install the app on an Android 15 emulator or device configured with a 16 KB page size.
2. Verify that the app launches and runs without native crashes related to memory mapping or page alignment.
3. Optionally, test on devices with 4 KB page size to confirm backward compatibility.

Screenshots

No UI changes.

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Latest commit: 532b1eb

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[okwasniewski]

Hey, thanks for your PR.

Do you think it's necessary to add this? Shouldn't it be handled by React Native?

[seyedmostafahasani]

Hey, Anytime!
I think it will take a while until React Native implements it, so we can handle it for now since some developers might need it. WDYT?