flash a connected device
usage: fx flash [-s <serial>] [--build|--no-build]
--build | --no-build Build (or not) the required dependencies
-s Serial of device you wish to flash to (only necessary
if multiple devices in fastboot mode)
--skip-verify Skip hardware verification. This is dangerous, please be
sure the images you are flashing match the device. Only
supported with ffx
--no-bootloader-reboot Don't reboot bootloader after flashing firmware or
recovery fastboot image.
Defaults are defined by the "incremental" feature:
'fx --enable=incremental flash' defaults to "--build"
'fx --disable=incremental flash' defaults to "--no-build"