Route KernelWakelockReader's userspace native wakelock stats

collection to SystemSuspend (ISuspendControl::getWakeLockStats())

Native wakelocks obatined via SystemSuspend when useSuspendCounter is
enabled, will not be reflected in the information available from
/d/wakeup_sources or proc/wakelocks. This information has been
made available via the ISuspendControl AIDL interface of SystemSuspend.
Kernelwakelock stats however are still being collected in the
/d/wakeup_sources.

Change-Id: I208d004aa0fabcf367016faae77ad51388cdf0ea
Bug: 135680393
Test: Observe SystemSuspend service wakelocks in dumpsys batterystats (for
instance, "PowerManager.SuspendLockout"):
`dumpsys batterystats --checkin | grep wl | grep PowerManager.SuspendLockout`