[powersavemode] Use D-Bus types when constructing D-Bus message
[powersavemode] Use D-Bus types when constructing D-Bus message

Even if gboolean would end up being similar enough to dbus_bool_t, it
is purely accidental.

Use only strongly defined D-Bus types in dbus_message_append_args() call.

spiiroin/mce,spiiroin/mce,spiiroin/mce,spiiroin/mce