kernel: Boost all CPUs to the max when userspace launches an app

Zygote is Android's application process, and it only forks when launching
a new app for the first time. To accelerate app launches, boost all CPUs
to the max for 1250 ms when zygote decides to fork.

Signed-off-by: Sultan Alsawaf <sultanxda@gmail.com>
Signed-off-by: Francisco Franco <franciscofranco.1990@gmail.com>