Add the element-call-ios dependency and a developer option for native calls
The package carries the call UI and the matrix-rust-rtc media stack, pinned by
exact version the way the SDK is, with the local path kept commented out for
working against a checkout. Its media xcframework has no Intel simulator slice
and a package cannot say so for the projects that consume it, hence the
excluded architecture at the project level.
The developer option is off by default and nothing reads it yet. It is placed
next to the Element Call URL override, which only applies to the web view that
native calls replace.
* Use native video call picture in picture!
* Handle isSupported, isPossible and web view errors.
* Use new canEnterPip method.
* Hide a room's Call button when already joined to the call.
* Tweak feature flag description.
* PR comments.
- tear down ElementCall screens when ending the call from the CXCallController
- make the call UI available in the task manager and lock screen
- Fix broken hang up widget message format