* Logger class changes only
Now compile-time checking is possible with the help of Nullable Value
types.
* Misc formatting
* Manual optimizations
PrintGuestLog
PrintGuestStackTrace
Surfaceflinger DequeueBuffer
* Reduce SendVibrationXX log level to Debug
* Add Notice log level
This level is always enabled and used to print system info, etc...
Also, rewrite LogColor to switch expression as colors are static
* Unify unhandled exception event handlers
* Print enabled LogLevels during init
* Re-add App Exit disposes in proper order
nit: switch case spacing
* Revert PrintGuestStackTrace to Info logs due to #1407
PrintGuestStackTrace is now called in some critical error handlers
so revert to old behavior as KThread isn't part of Guest.
* Batch replace Logger statements
* am: Implemnet common web applets
This implement parsing of input and output of web applets while making
those close directly.
TODO for the future: Use and hook a web browser.
* Address Ac_K's comments
