Remove global service declarations and change to declarations upon usage. (#761)

* Remove global service declarations and change to declarations upon usage.

* Only load cava service if cava is enabled.

src/globals/media.ts

@@ -1,9 +1,9 @@
 import { bind, Variable } from 'astal';
 import AstalMpris from 'gi://AstalMpris?version=0.1';
 import { getTimeStamp } from 'src/components/menus/media/components/timebar/helpers';
-import { mprisService } from 'src/lib/constants/services';
 import options from 'src/options';
 
+const mprisService = AstalMpris.get_default();
 const { noMediaText } = options.menus.media;
 
 export const activePlayer = Variable<AstalMpris.Player | undefined>(undefined);

src/globals/notification.ts

@@ -1,10 +1,10 @@
-import { notifdService } from 'src/lib/constants/services';
 import icons from 'src/lib/icons/icons2';
 import options from 'src/options';
 import { errorHandler, lookUpIcon } from 'src/lib/utils';
 import { Variable } from 'astal';
 import AstalNotifd from 'gi://AstalNotifd?version=0.1';
 
+const notifdService = AstalNotifd.get_default();
 const { clearDelay } = options.notifications;
 
 export const removingNotifications = Variable<boolean>(false);