## Changes
Takes care of [this
TODO](https://github.com/matrix-org/matrix-rust-sdk/blob/9df1c480795c42afcee39e4c7e553d5a927a2680/crates/matrix-sdk-ui/src/timeline/mod.rs#L520).
- sdk & sdk-ui: unify `Timeline::edit` and `Timeline::edit_polls`, the
new fn takes an `EditedContent` parameter now, which includes a
`PollStart` case too.
- ffi: also unify the FFI fns there, using `PollStart` and a new
`EditContent` enum that must be passed from the clients like:
```kotlin
val messageContent = MessageEventContent.from(...)
timeline.edit(event, EditedContent.RoomMessage(messageContent))
```
Since the is mainly about changing the fns signatures I've reused the
existing tests, including one that used `edit_poll` that now uses the
new fn.
---------
Co-authored-by: Benjamin Bouvier <benjamin@bouvier.cc>
Jorge Martin Espinosa
31e6df7234