Android: Use CONFIG_WNM mode consistently
Replace CONFIG_IEEE80211V with CONFIG_WNM to get more consistent build
options for WNM-Sleep Mode operations. This is similar to the Makefile
change in commit ad3872a3720df13d8fc1a4345a5f0a8c3a204b4e.
Signed-hostap: Jouni Malinen <j@w1.fi>