Require 16kb pages sizes for Android builds

[tnull]

Fixes #624.

Google announced that starting Nov 2025 all apps in the Play Store will be required to be compatible with 16KB page sizes (cf. https://developer.android.com/guide/practices/page-sizes). Here we update our linker flags to ensure the generated shared libraries meet that requirement.

[ldk-reviews-bot]

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[TheBlueMatt]

Where'd you get the common-page-size option from? The Google docs seem to indicate we only need the max-page-size option.

[tnull]

Where'd you get the common-page-size option from? The Google docs seem to indicate we only need the max-page-size option.

They mention it here for NDK r22 and lower: https://developer.android.com/guide/practices/page-sizes#compile-r22-lower
I guess it's not necessary for us strictly, do you think there will be a drawback from setting it? Seemed reasonable given 16kb will be the standard going forward after Android 15+, IIUC?