QDL flashing time should be less than or equal to the optimized fastboot flashing time

[andiradulescu]

No description provided.

[andiradulescu]

Preliminary results on #54:

FASTBOOT:
Time taken to flash aop: 0.04 seconds
Time taken to flash devcfg: 0.03 seconds
Time taken to flash xbl: 0.17 seconds
Time taken to flash xbl_config: 0.03 seconds
Time taken to flash abl: 0.03 seconds
Time taken to flash boot: 0.45 seconds
Time taken to flash system: 108.55 seconds

QDL:
Time taken to flash aop_a: 0.45 seconds
Time taken to flash devcfg_a: 0.45 seconds
Time taken to flash xbl_a: 0.27 seconds
Time taken to flash xbl_config_a: 0.22 seconds
Time taken to flash abl_a: 0.45 seconds
Time taken to flash boot_a: 0.84 seconds
Time taken to flash system_a: 103.45 seconds

* with a 4000MB image: commaai/agnos-builder#355