Add special flow for leaving a space as the last owner (#6112)

* When the user is in a v12 room, use different UI to select the last owner when leaving

- Add `LeaveSpaceRoom.areCreatorsPrivileged` to detect when this is happening.
- Import new strings.
- Build the new UI.
- Attach it to a change member roles screen navigation.

* Don't display the `isLastOwner` UI if the user is the only joined one in the room

* Rename `LeaveSpaceState.isLastOwner` to `.needsOwnerChange`. This way, it's easier to understand the difference with the passed `LeaveSpaceRoom.isLastOwner` value

* Add a test for the new check of user not being the last joined member

* Fix paddings in `LeaveSpaceView`

* Update screenshots

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Co-authored-by: ElementBot <android@element.io>

features/space/impl/build.gradle.kts

@@ -52,4 +52,5 @@ dependencies {
     testImplementation(projects.libraries.featureflag.test)
     testImplementation(projects.features.createroom.test)
     testImplementation(projects.features.invite.test)
+    testImplementation(projects.features.rolesandpermissions.test)
 }