Android Support

• Added Android real-time transcription support (Android 13 / API 33). Realtime transcription now works on iOS and Android; Android only supports real-time (not file-based) transcription.
• Updated docs:
  • README now documents Android support, platform-specific permission guidance, and updated requirements.
  • requestPermissions() noted as iOS-only; microphone permission used on Android.
  • File-based transcription APIs (transcribeAudioWithSFRecognizer, transcribeAudioWithAnalyzer) and isAnalyzerAvailable() are iOS-only.
• Example/UI:
  • Redesigned example/RecordRealTimeAndTranscribe.tsx UI to match App.tsx styling while keeping original functionality (permissions, start/stop, live transcription).
• Limitations/reminders:
  • File-based transcription remains iOS-only.
  • Android requires API level 33+ (Android 13).
  • Locale is still hardcoded to en_US.