fix: publish android debug symbols

[ovitrif]

Refs synonymdev/bitkit-android#982

Related

• fix: retain native debug symbols bitkit-android#988
• fix: require android dwarf symbols bitkit-core#100
• fix: publish android debug symbols vss-rust-client-ffi#13
• fix: publish android dwarf symbols pubky/paykit-rs#54

Description

This publishes ldk-node-android 0.7.0-rc.48 with Android native libraries that keep full DWARF .debug_info metadata and 16 KB LOAD alignment for Bitkit Android release symbolication.

This PR:

• Bumps the Synonym fork package version to 0.7.0-rc.48.
• Regenerates Android JNI libs with cargo ndk --no-strip.
• Uses Android NDK r28c and Android linker flags for 16 KB LOAD segment alignment.
• Exports ANDROID_NDK_ROOT via $GITHUB_ENV after setup-ndk.
• Fails shell and Gradle publish validation if libldk_node.so lacks .debug_info or 16 KB LOAD alignment.
• Preserves libldk_node.so symbols through Gradle release AAR packaging.
• Updates the Android publish workflow to regenerate bindings before Gradle build/publish.

Validation

• Package published: com.synonym:ldk-node-android:0.7.0-rc.48
• Package workflow run: 27030312422
• Local validation passed: bash -n scripts/uniffi_bindgen_generate_kotlin_android.sh
• Local validation passed: ./bindings/kotlin/ldk-node-android/gradlew --project-dir ./bindings/kotlin/ldk-node-android :lib:validateReleaseNativeLibraries
• Local validation passed: git diff --check
• Release-event workflow behavior should be re-verified after merge.