fix(Android): improve legacy RN runtime compatibility

[floydkim]

Summary

This PR improves Android runtime compatibility for React Native legacy versions while expanding RN CLI example coverage for matrix testing.

Key Changes

• Added RN CLI example apps for versions 0.74.7 through 0.84.0 under Examples/.
• Improved setup script resilience across RN template variants (especially iOS project patch differences).
• Added automatic new architecture disabling for RN < 0.77 in setup flow.
• Replaced release-history retrieval from axios to fetch in the example template.

Runtime-impacting Change (Important)

• Commit: e4a37e75f8296439915a3157980b4086bc75d76d
• Scope: Android library runtime path for bundle switching/restart.
• CodePushNativeModule reflection logic now supports legacy RN field/method variations by:
  • Searching class hierarchy (including superclasses) instead of only the concrete class.
  • Resolving ReactHost through Activity.getReactHost() reflection for broader version compatibility.
• Added Proguard keep rules so reflection targets are preserved in release builds.