This allows flame to boot TWRP. Still will need to work on
super partition for vendor and system access.
The plan will be to cherry-pick any updates to android-9.0
through gerrit.twrp.me to this branch as a WIP.
if the image has the right magic bytes to be a sparse image,
use simg2img to flash the image
create a rule to make a fully dynamic simg2img which results in a
much smaller increase in gzip ramdisk size (2KB vs 40KB)
Change-Id: I1b0f6bc127da46103888b1154a9bddd8ac02c01d