feat: o3 level optimization for image diffing

[abelonogov-ld]

Summary

Replace the CMake-compiled C native library with prebuilt .so binaries in the Android SDK, pin additional AndroidX Lifecycle dependencies in the MAUI NuGet packages, and bump the MAUI SDK version to 0.5.2.

Changes

Android SDK (observability-android)

• Switch from CMake source compilation to prebuilt .so binaries: Removed all C source files (tile_hash.c, tile_hash.h, tile_hash_jni.c, nearest_divisor.c, nearest_divisor.h) and the externalNativeBuild { cmake { ... } } block from build.gradle.kts. Added prebuilt libsession_replay_c.so binaries under jniLibs/ for all four ABIs: arm64-v8a, armeabi-v7a, x86, x86_64. This eliminates the CMake/NDK build dependency and ensures consistent binary output across environments.
• Rename native library: Updated TileHashNative.kt to load session_replay_c instead of the old tile_hash library name.

MAUI / .NET SDK (mobile-dotnet)

• Pin additional AndroidX Lifecycle dependencies: Added Xamarin.AndroidX.Lifecycle.LiveData and Xamarin.AndroidX.Lifecycle.ViewModelSavedState at [2.9.2.1, 3.0.0) in both LDObservability.csproj and LDObservability.Fat.csproj to prevent NU1608 version-mismatch warnings in consumer projects.
• Version bump to 0.5.2 in Directory.Build.props.

Test Plan

• Build Android SDK — verify it compiles without CMake/NDK and the prebuilt .so files are bundled correctly in the AAR
• Run Android SDK on all ABIs (arm64-v8a, armeabi-v7a, x86, x86_64) — verify TileHashNative loads libsession_replay_c.so successfully
• Build MAUI SDK — verify no NU1608 dependency warnings
• Run session replay on Android via MAUI — verify tile hashing works end-to-end

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Note

Medium Risk
Switches Android session-replay hashing from source-built JNI (CMake/NDK) to bundled prebuilt .so binaries and renames the loaded library, which can impact runtime loading/ABI compatibility. Additional AndroidX pinning and a package version bump are low risk but may affect downstream dependency resolution.

Overview
Moves Android session replay tile-hashing from a CMake/NDK-built JNI library to prebuilt native binaries: removes the CMake build configuration and deletes the C sources/JNI glue, relies on packaged libsession_replay_c.so under jniLibs/ for all ABIs, and updates TileHashNative to load session_replay_c.

Updates the .NET MAUI NuGet packaging by bumping LaunchDarkly.SessionReplay to 0.5.2 and pinning additional AndroidX Lifecycle dependencies (LiveData, ViewModelSavedState, and aligned LiveData.Core) to reduce consumer version-conflict warnings.

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