wifi(interface): Add wifi host debug wake up reason stats

These stats are used to determine if the device is being woken up
frequently by the wlan chipset. The stats structure describe all the
various resons for which the host was woken up by the wlan chipset
(firmware).

Bug: 32221997
Test: ./hardware/interfaces/update-makefiles.sh
Change-Id: Id52915348fef0283affcd834c6f1db5055e54ace