Generic element call link support (#1643)

* Remove swift-url-routing and replace it with a custom implementation. It fails parsing the fragments in app.element.io links and it doesn't bring any value
* Add handling for opening generic element call links
* Add applinks support for call.element.io
* Enable VoIP and Audio playback background modes

ElementX/SupportingFiles/target.yml

@@ -75,7 +75,9 @@ targets:
         NSPhotoLibraryAddUsageDescription: Allows saving photos and videos to your library.
         NSLocationWhenInUseUsageDescription: When you share your location to people, $(APP_DISPLAY_NAME) needs access to show them a map.
         UIBackgroundModes: [
-          fetch
+          fetch,
+          audio,
+          voip
         ]
         BGTaskSchedulerPermittedIdentifiers: [
           io.element.elementx.background.refresh
@@ -175,7 +177,6 @@ targets:
     - package: SwiftState
     - package: GZIP
     - package: Sentry
-    - package: URLRouting
     - package: Version
     - package: Emojibase
     - package: WysiwygComposer