libsuspend: make sleep state configurable and add a fallback

This patch allows the user to set the sleep state target from
Android properties for wakeup_count method.

It also includes a fallback state if the default state is not
available and the user didn't set the sleep.state property.

Signed-off-by: Jaap Jan Meijer <jjmeijer88@gmail.com>
1 file changed