Migrate wake-word engine and enhance model management features

[kangrio]

Change:

• Migrate wake-word detection engine from Snowboy to AndroidWakeWord to reduce false triggers
  • Recommended to clear app data after updated to this version
  • Warning: Previously trained Snowboy models (.pmdl) will no longer be usable with the new engine
• Support downloading, importing, and loading online/custom wake-word models from app data
  • Can delete imported model with long press on model
• Implement fallback to default model when specified wake-word model is missing
• Pause wake-word detection during assistant activation with a 5s debounce
• Implement Logcat viewer activity with batched UI updates
• Prevent activity recreation on orientation change and set StartActivity launchMode to singleTask
• Add built-in Logcat viewer activity with batched UI updates
• Add ADB connection status toast notifications on the main thread
• Fix DiLink detection logic