timedate: treat 'activating' or 'inactivating' NTP client status as 'active'

When `timedatectl set-time` is called, NTP client may be in
'activating' or something. For safety, let's treat such states as
'active'.

This also changes all unit file status except for 'masked' or 'disabled'
are treated as 'enabled'.

src/timedate/timedated.c

@@ -160,7 +160,7 @@ static int context_ntp_service_is_active(Context *c) {
         /* Call context_update_ntp_status() to update UnitStatusInfo before calling this. */
 
         LIST_FOREACH(units, info, c->units)
-                count += streq_ptr(info->active_state, "active");
+                count += !STRPTR_IN_SET(info->active_state, "inactive", "failed");
 
         return count;
 }
@@ -174,7 +174,7 @@ static int context_ntp_service_is_enabled(Context *c) {
         /* Call context_update_ntp_status() to update UnitStatusInfo before calling this. */
 
         LIST_FOREACH(units, info, c->units)
-                count += STRPTR_IN_SET(info->unit_file_state, "enabled", "enabled-runtime");
+                count += !STRPTR_IN_SET(info->unit_file_state, "masked", "masked-runtime", "disabled", "bad");
 
         return count;
 }