Force last owner of a room to pass ownership when leaving (#5094)

* Move `ChangeRoles*` classes to their own module so they can be shared

* Hook the change roles screen to the leave room action, add confirmation dialogs

* Use enum instead of sealed interface for `ChangeRoomMemberRolesListType`

* Try to improve communications between nodes

* refactor (leave room) : makes sure to expose only necessary code from api module

* Add `:libraries:previewutils` module to share some test fixtures used for UI previews

* Update screenshots

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Co-authored-by: ElementBot <android@element.io>
Co-authored-by: ganfra <francoisg@matrix.org>

features/leaveroom/api/build.gradle.kts

@@ -14,7 +14,5 @@ android {
 
 dependencies {
     implementation(projects.libraries.architecture)
-    implementation(projects.libraries.designsystem)
-    implementation(projects.libraries.uiStrings)
     implementation(projects.libraries.matrix.api)
 }