Changelog OG kernel rev 30

Changelog:

* Upstream and merge to v4.19.255

* Mark boost kthreads as performance critical

* Hard-code maximum swappiness to 200 

* Boost cpu & ddr for a longer period of time when opening an app

* New timer events oriented governor for tickless systems

* Optimise charging current

* Relax implicit barriers in default I/O accessors

* Optimized Console FrameBuffer for upto 70% increase in Performance

* Optimize policy update loop on input boost

* Bring in some EXT4 optimizations