Revert "McdAccount: always pass static strings to mcd_account_changed_property"
Revert "McdAccount: always pass static strings to mcd_account_changed_property"

This reverts commit eee23bb66e83cb61546c2710279cb3d4f0d10829.

Alberto points out:

> Our property names are indeed static, because
> they are taken from the static structure that defines the property.
> See the last few lines in mcd_dbusprop_set_property:
>
>     /* we pass property->name, because we know it's a static value and there
>      * will be no need to care about its lifetime */
>     return property->setprop (self, property->name, value, error);

Conflicts:

	src/mcd-account.c

freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control