Fix not being able to decline an invite from the room list

[jmartinesp]

Content

• Use the new RoomListItem.invitedRoom() API to get a room in an invited membership state that won't need a timeline to work.
• When calling the 'decline invite' APIs using AcceptDeclineInvitePresenter get an invited room instead of the full room and decline the invite.

Motivation and context

Fixes https://github.com/element-hq/element-x-android/issues/3407.

Note the implementation is a quick fix and some iteration on this issue is encouraged: ideally, we'd have JoinedRoom and InvitedRoom abstractions that share a minimum of logic, and maybe both implement a simplified MatrixRoom.

Tests

• Get an invite in the room list.
• Decline it.
• Get another invite.
• Open its preview by tapping on the item.
• Decline it.

Tested devices

• [x] Physical
• [ ] Emulator
• OS version(s): 14

Checklist

• [ ] Changes have been tested on an Android device or Android emulator with API 23
• [ ] UI change has been tested on both light and dark themes
• [ ] Accessibility has been taken into account. See https://github.com/element-hq/element-x-android/blob/develop/CONTRIBUTING.md#accessibility
• [x] Pull request is based on the develop branch
• [x] Pull request title will be used in the release note, it clearly define what will change for the user
• [ ] Pull request includes screenshots or videos if containing UI changes
• [ ] Pull request includes a sign off
• [x] You've made a self review of your PR

[github-actions[bot]]

:iphone: Scan the QR code below to install the build (arm64 only) for this PR. If you can't scan the QR code you can install the build via this link: https://i.diawi.com/bmu7yp

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 90.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 82.63%. Comparing base (764692b) to head (499aaef).

Files with missing lines	Patch %	Lines
...vite/impl/response/AcceptDeclineInvitePresenter.kt	50.00%	0 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #3466 +/- ## ======================================== Coverage 82.63% 82.63% ======================================== Files 1701 1702 +1 Lines 40047 40055 +8 Branches 4872 4872 ======================================== + Hits 33092 33100 +8 Misses 5234 5234 Partials 1721 1721 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.