[Android] Use Hermes V1 by default

[cipolleschi]

Summary:

The recent introduction of the IRuntime JSI interface moved ScopeState from Runtime to IRuntime, changing the C++ ABI (mangled symbol names). The Android build was still consuming a legacy Hermes nightly (hermes-compiler@nightly) that was built against the old JSI headers, causing an UnsatisfiedLinkError crash at startup:

dlopen failed: cannot locate symbol "_ZN8facebook3jsi7Runtime8popScopeEPNS1_10ScopeStateE" referenced by "libhermesvm.so"

This PR aligns Android with how iOS already handles Hermes V1:

1. scripts/try-set-nightly-hermes-compiler.js — The yarn install preinstall hook now installs hermes-compiler@latest-v1 instead of hermes-compiler@nightly. This is the same npm dist-tag that iOS uses in scripts/ios-prebuild/hermes.js.

2. build.gradle.kts — When hermesV1Enabled=true, the Hermes version from package.json is used as-is (no -SNAPSHOT suffix), since V1 stable releases are published as regular Maven artifacts, not snapshots.

3. version.properties — Bumps HERMES_V1_VERSION_NAME from 250829098.0.11 to 250829098.0.12 for release builds and iOS podspec.

Changelog:

[ANDROID] [FIXED] - Use Hermes V1 stable release instead of legacy nightly to fix startup crash caused by JSI ABI mismatch

Test Plan:

• Run yarn install from the repo root and verify hermes-compiler in packages/react-native/package.json is set to the latest-v1 version (currently 250829098.0.12)
• Run yarn android from packages/rn-tester and verify the app launches without crashing
• Verify CI build_android job passes

[meta-codesync]

@cipolleschi has imported this pull request. If you are a Meta employee, you can view this in D101247487.