As part of enabling dark resume on Chromebooks again, we need to identify the wake source.
We depend on wakeup_count of input devices to identify the device that woke the system up.
As a fall back, we also look at events from input devices. If we see an input event when in dark resume, we do a full resume.
But currently on devices that use AT keyboard driver, neither  wakeup_count nor input events are reported when a wake is caused by key press. This is the tracking bug to fix the same.