crDroid v7.19 released for zerofltexx and zeroltexx

Changes from last release:
Updated to v7.19 from 7.18
Added GPU UC/OC/UV. Can underclock to 100mhz, overclock to 852mhz and undervolt.
Added CPU undervolting
Initial zeroltexx release

ToDo:
SELinux enforcing
s7e battery mod for s6 flat
Android 12L build (probably need to ask for help on this one). If anyone would like to help, reach out on github or xda!