fix: update DataStore for 16 KB compatibility

[ovitrif]

Fixes #1103

This PR:

1. Updates AndroidX DataStore to 1.2.1 so libdatastore_shared_counter.so uses 16 KB-aligned GNU_RELRO padding.
2. Leaves every other native dependency version and the existing native packaging and release paths unchanged.
3. Clears the complete Android compatibility alert in a clean Android 17/API 37 installation with PAGE_SIZE=16384; the captured runtime result reports pageSizeCompat=0.

QA Notes

Manual Tests

• Fresh-install mainnetDebug on the Android 17 Pixel_10_Pro_XL emulator with a 16 KB page size → Confirm the Android compatibility alert is absent and pageSizeCompat=0.

Automated Checks

• just compile
• just test
• just lint
• just changelog next
• Remote-only :app:assembleMainnetDebug --refresh-dependencies with Maven Local excluded
• git diff --check

[ovitrif]

@coreyphillips Thanks — your review identified the problem. The verification script and 49k-line vendored rewrite were an overengineered, bad AI attempt. I removed them completely.

This PR now contains only the DataStore 1.2.0 → 1.2.1 update and its changelog fragment: 2 insertions and 1 deletion. The original Android 17 alert named libdatastore_shared_counter.so and reported its GNU_RELRO segment as unaligned. Focused llvm-readelf inspection shows the official 1.2.1 binary moves the GNU_RELRO end from 0xd000 to the 16 KB boundary at 0xc000.

I then built mainnetDebug from remote dependencies and performed a fresh uninstall/install on a clean Android 17 Pixel 10 Pro XL 16 KB emulator. The app reaches the Terms screen without the compatibility alert and reports pageSizeCompat=0.

Bundled ML Kit remains unchanged. The scanner code, native verification scripts, symbol packaging, and NativeReleaseConfigTest are unchanged from master. Against #1106, gradle/libs.versions.toml auto-merges; the only merge-tree conflict is LightningService.kt, and the same conflict already exists between current master and #1106.

Could you re-review the reduced head f9b61c149?

[jvsena42]

tested on Pixel 9 Android 17 / API 37, PAGE_SIZE=16384 (16 KB pages) emulator