Add call state localizations

lib/src/event.dart

@@ -584,6 +584,18 @@ class Event extends MatrixEvent {
           localizedBody += '. ' + i18n.needPantalaimonWarning;
         }
         break;
+      case EventTypes.CallAnswer:
+        localizedBody = i18n.answeredTheCall(senderName);
+        break;
+      case EventTypes.CallHangup:
+        localizedBody = i18n.endedTheCall(senderName);
+        break;
+      case EventTypes.CallInvite:
+        localizedBody = i18n.startedACall(senderName);
+        break;
+      case EventTypes.CallCandidates:
+        localizedBody = i18n.sentCallInformations(senderName);
+        break;
       case EventTypes.Encrypted:
       case EventTypes.Message:
         switch (messageType) {

lib/src/utils/matrix_localizations.dart

@@ -109,6 +109,14 @@ abstract class MatrixLocalizations {
   String couldNotDecryptMessage(String errorText);
 
   String unknownEvent(String typeKey);
+
+  String startedACall(String senderName);
+
+  String endedTheCall(String senderName);
+
+  String answeredTheCall(String senderName);
+
+  String sentCallInformations(String senderName);
 }
 
 extension HistoryVisibilityDisplayString on HistoryVisibility {

test/fake_matrix_localizations.dart

@@ -306,4 +306,28 @@ class FakeMatrixLocalizations extends MatrixLocalizations {
   @override
   // TODO: implement you
   String get you => null;
+
+  @override
+  String answeredTheCall(String senderName) {
+    // TODO: implement answeredTheCall
+    return null;
+  }
+
+  @override
+  String endedTheCall(String senderName) {
+    // TODO: implement endedTheCall
+    return null;
+  }
+
+  @override
+  String sentCallInformations(String senderName) {
+    // TODO: implement sentCallInformations
+    return null;
+  }
+
+  @override
+  String startedACall(String senderName) {
+    // TODO: implement startedACall
+    return null;
+  }
 }

test/matrix_default_localizations.dart

@@ -205,4 +205,24 @@ class MatrixDefaultLocalizations extends MatrixLocalizations {
 
   @override
   String get you => 'You';
+
+  @override
+  String answeredTheCall(String senderName) {
+    return 'answeredTheCall';
+  }
+
+  @override
+  String endedTheCall(String senderName) {
+    return 'endedTheCall';
+  }
+
+  @override
+  String sentCallInformations(String senderName) {
+    return 'sentCallInformations';
+  }
+
+  @override
+  String startedACall(String senderName) {
+    return 'startedACall';
+  }
 }