[MatrixRTC] Multi SFU support + m.rtc.member event type support (#5022)

* WIP

* temp

Signed-off-by: Timo K <toger5@hotmail.de>

* Fix imports

* Fix checkSessionsMembershipData thinking foci_preferred is required

* incorporate CallMembership changes
 - rename Focus -> Transport
 - add RtcMembershipData (next to `sessionMembershipData`)
 - make `new CallMembership` initializable with both
 - move oldest member calculation into CallMembership

Signed-off-by: Timo K <toger5@hotmail.de>

* use correct event type

Signed-off-by: Timo K <toger5@hotmail.de>

* fix sonar cube conerns

Signed-off-by: Timo K <toger5@hotmail.de>

* callMembership tests

Signed-off-by: Timo K <toger5@hotmail.de>

* make test correct

Signed-off-by: Timo K <toger5@hotmail.de>

* make sonar cube happy (it does not know about the type constraints...)

Signed-off-by: Timo K <toger5@hotmail.de>

* remove created_ts from RtcMembership

Signed-off-by: Timo K <toger5@hotmail.de>

* fix imports

Signed-off-by: Timo K <toger5@hotmail.de>

* Update src/matrixrtc/IMembershipManager.ts

Co-authored-by: Robin <robin@robin.town>

* rename LivekitFocus.ts -> LivekitTransport.ts

Signed-off-by: Timo K <toger5@hotmail.de>

* add details to `getTransport`

Signed-off-by: Timo K <toger5@hotmail.de>

* review

Signed-off-by: Timo K <toger5@hotmail.de>

* use DEFAULT_EXPIRE_DURATION in tests

Signed-off-by: Timo K <toger5@hotmail.de>

* fix test `does not provide focus if the selection method is unknown`

Signed-off-by: Timo K <toger5@hotmail.de>

* Update src/matrixrtc/CallMembership.ts

Co-authored-by: Robin <robin@robin.town>

* Move `m.call.intent` into the `application` section for rtc member events.

Signed-off-by: Timo K <toger5@hotmail.de>

* review on rtc object validation code.

Signed-off-by: Timo K <toger5@hotmail.de>

* user id check

Signed-off-by: Timo K <toger5@hotmail.de>

* review: Refactor RTC membership handling and improve error handling

Signed-off-by: Timo K <toger5@hotmail.de>

* docstring updates

Signed-off-by: Timo K <toger5@hotmail.de>

* add back deprecated `getFocusInUse` & `getActiveFocus`

Signed-off-by: Timo K <toger5@hotmail.de>

* ci

Signed-off-by: Timo K <toger5@hotmail.de>

* Update src/matrixrtc/CallMembership.ts

Co-authored-by: Robin <robin@robin.town>

* lint

Signed-off-by: Timo K <toger5@hotmail.de>

* make test less strict for ew tests

Signed-off-by: Timo K <toger5@hotmail.de>

* Typescript downstream test adjustments

Signed-off-by: Timo K <toger5@hotmail.de>

* err

Signed-off-by: Timo K <toger5@hotmail.de>

---------

Signed-off-by: Timo K <toger5@hotmail.de>
Co-authored-by: Robin <robin@robin.town>

src/matrixrtc/types.ts

@@ -156,3 +156,11 @@ export type Statistics = {
 
 export const isMyMembership = (m: CallMembership, userId: string, deviceId: string): boolean =>
     m.sender === userId && m.deviceId === deviceId;
+
+/**
+ *  A RTC transport is a JSON object that describes how to connect to a RTC member.
+ */
+export interface Transport {
+    type: string;
+    [key: string]: unknown;
+}