Respect timeout multiplier in PermissionControllerManager

Adjust timeouts by hardware multiplier, to account for slower CPUs. This
resolves issues observed on certain hosts where completing default
permission grants at boot takes upwards of 160 seconds.

Bug: 281589918
Test: Ran RISCV64 target boot test on ARM servers (x4).
Change-Id: I47e416b13898c8b34e7bf3cf409d49d85fb559e6