Make video tiles be based on MatrixRTC member not LiveKit participants (#2701)

* make tiles based on rtc member

* display missing lk participant + fix tile multiplier

* add show_non_member_participants config option

* per member tiles

* merge fixes

* linter

* linter and tests

* tests

* adapt tests (wip)

* Remove unused keys

* Fix optionality of nonMemberItemCount

* video is optional

* Mock RTC members

* Lint

* Merge fixes

* Fix user id

* Add explicit types for public fields

* isRTCParticipantAvailable => isLiveKitParticipantAvailable

* isLiveKitParticipantAvailable

* Readonly

* More keys removal

* Make local field based on view model class not observable

* Wording

* Fix RTC members in tes

* Tests again

* Lint

* Disable showing non-member tiles by default

* Duplicate screen sharing tiles like we used to

* Lint

* Revert function reordering

* Remove throttleTime from bad merge

* Cleanup

* Tidy config of show non-member settings

* tidy up handling of local rtc member in tests

* tidy up test init

* Fix mocks

* Cleanup

* Apply local override where participant not yet known

* Handle no visible media id

* Assertions for one-on-one view

* Remove isLiveKitParticipantAvailable and show via encryption status

* Handle no local media (yet)

* Remove unused effect for setting

* Tidy settings

* Avoid case of one-to-one layout with missing local or remote

* Iterate

* Remove option to show non-member tiles to simplify code review

* Remove unused code

* Remove more remnants of show-non-member-tiles

* iterate

* back

* Fix unit test

* Refactor

* Expose TestScheduler as global

* Fix incorrect type assertion

* Simplify speaking observer

* Fix

* Whitespace

* Make it clear that we are mocking MatrixRTC memberships

* Test case for only showing tiles for MatrixRTC session members

* Simplify diff

* Simplify diff

These changes are in https://github.com/element-hq/element-call/pull/2809

* .

* Whitespaces

* Use asObservable when exposing subject

* Show "waiting for media..." when no participant

* Additional test case

* Don't show "waiting for media..." in case of local participant

* Make the loading state more subtle
 - instead of a label we show a animated gradient

* Use correct key for matrix rtc foci in code comment. (#2838)

* Update src/tile/SpotlightTile.tsx

Co-authored-by: Timo <16718859+toger5@users.noreply.github.com>

* Update src/state/CallViewModel.ts

Co-authored-by: Timo <16718859+toger5@users.noreply.github.com>

* Make the purpose of BaseMediaViewModel.local explicit

* Use named object instead of unnamed array for spotlightAndPip

* Refactor spotlightAndPip into spotlight and pip

* Use if statement instead of ternary for readability in spotlight and pip logic

* Review feedback

* Fix tests for CallEventAudioRenderer

* Lint

* Revert "Make the loading state more subtle"

This reverts commit 765f7b4f31.

* Update src/state/CallViewModel.ts

Co-authored-by: Timo <16718859+toger5@users.noreply.github.com>

* Fix spelling

* Remove a non-null assertion that failed at runtime

---------

Co-authored-by: Hugh Nimmo-Smith <hughns@element.io>
Co-authored-by: Hugh Nimmo-Smith <hughns@users.noreply.github.com>

src/tile/SpotlightTile.test.tsx

@@ -12,7 +12,11 @@ import userEvent from "@testing-library/user-event";
 import { of } from "rxjs";
 
 import { SpotlightTile } from "./SpotlightTile";
-import { withLocalMedia, withRemoteMedia } from "../utils/test";
+import {
+  mockRtcMembership,
+  withLocalMedia,
+  withRemoteMedia,
+} from "../utils/test";
 import { SpotlightTileViewModel } from "../state/TileViewModel";
 
 global.IntersectionObserver = class MockIntersectionObserver {
@@ -22,6 +26,7 @@ global.IntersectionObserver = class MockIntersectionObserver {
 
 test("SpotlightTile is accessible", async () => {
   await withRemoteMedia(
+    mockRtcMembership("@alice:example.org", "AAAA"),
     {
       rawDisplayName: "Alice",
       getMxcAvatarUrl: () => "mxc://adfsg",
@@ -29,6 +34,7 @@ test("SpotlightTile is accessible", async () => {
     {},
     async (vm1) => {
       await withLocalMedia(
+        mockRtcMembership("@bob:example.org", "BBBB"),
         {
           rawDisplayName: "Bob",
           getMxcAvatarUrl: () => "mxc://dlskf",