Allow Element Call to recieve/send call decline events (#30694)

* Allow Element Call to recieve/send call decline events

* fix bad copy paste in test

Author: BillCarsonFr

src/stores/widgets/StopGapWidgetDriver.ts

@@ -190,6 +190,9 @@ export class StopGapWidgetDriver extends WidgetDriver {
                 EventType.Reaction,
                 EventType.RoomRedaction,
                 "io.element.call.reaction",
+                //  MSC4310: Add dev and final event to ease future transition,
+                EventType.RTCDecline,
+                "m.rtc.decline",
             ];
             for (const eventType of [...sendRoomEvents, ...sendRecvRoomEvents])
                 this.allowedCapabilities.add(WidgetEventCapability.forRoomEvent(EventDirection.Send, eventType).raw);

test/unit-tests/stores/widgets/StopGapWidgetDriver-test.ts

@@ -134,6 +134,11 @@ describe("StopGapWidgetDriver", () => {
             "org.matrix.msc3819.receive.to_device:m.call.replaces",
             "org.matrix.msc4157.send.delayed_event",
             "org.matrix.msc4157.update_delayed_event",
+            // RTC decline events
+            "org.matrix.msc2762.send.event:org.matrix.msc4310.rtc.decline",
+            "org.matrix.msc2762.receive.event:org.matrix.msc4310.rtc.decline",
+            "org.matrix.msc2762.send.event:m.rtc.decline",
+            "org.matrix.msc2762.receive.event:m.rtc.decline",
         ]);
 
         const approvedCapabilities = await driver.validateCapabilities(requestedCapabilities);