Stop ringing and remove toast if another device answers a RTC call. (#30728)

* Stop ringing if another device answers a call.

* Add test

* fix check

test/unit-tests/Notifier-test.ts

@@ -371,6 +371,7 @@ describe("Notifier", () => {
         beforeEach(() => {
             jest.spyOn(SettingsStore, "getValue").mockReturnValue(true);
             jest.spyOn(ToastStore.sharedInstance(), "addOrReplaceToast");
+            jest.spyOn(ToastStore.sharedInstance(), "dismissToast");
 
             mockClient.getPushActionsForEvent.mockReturnValue({
                 notify: true,
@@ -443,6 +444,52 @@ describe("Notifier", () => {
             spyCallMemberships.mockRestore();
         });
 
+        it("dismisses call notification when another device answers the call", () => {
+            const notifyEvent = emitCallNotifyEvent();
+            const spyCallMemberships = jest.spyOn(MatrixRTCSession, "callMembershipsForRoom");
+
+            expect(ToastStore.sharedInstance().addOrReplaceToast).toHaveBeenCalledWith(
+                expect.objectContaining({
+                    key: getIncomingCallToastKey(notifyEvent.getContent().call_id ?? "", roomId),
+                    priority: 100,
+                    component: IncomingCallToast,
+                    bodyClassName: "mx_IncomingCallToast",
+                    props: { notifyEvent },
+                }),
+            );
+            // Mock ourselves joining the call.
+            spyCallMemberships.mockReturnValue([
+                new CallMembership(
+                    mkEvent({
+                        event: true,
+                        room: testRoom.roomId,
+                        user: userId,
+                        type: EventType.GroupCallMemberPrefix,
+                        content: {},
+                    }),
+                    {
+                        call_id: "123",
+                        application: "m.call",
+                        focus_active: { type: "livekit" },
+                        foci_preferred: [],
+                        device_id: "DEVICE",
+                    },
+                ),
+            ]);
+            const callEvent = mkEvent({
+                type: EventType.GroupCallMemberPrefix,
+                user: "@alice:foo",
+                room: roomId,
+                content: {
+                    call_id: "abc123",
+                },
+                event: true,
+            });
+            emitLiveEvent(callEvent);
+            expect(ToastStore.sharedInstance().dismissToast).toHaveBeenCalled();
+            spyCallMemberships.mockRestore();
+        });
+
         it("should not show toast when calling with non-group call event", () => {
             emitCallNotifyEvent("event_type");