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/createroom/impl/src/main/res/values/localazy.xml

@@ -7,8 +7,6 @@
   <string name="screen_create_room_name_placeholder">"Add name…"</string>
   <string name="screen_create_room_new_room_title">"New room"</string>
   <string name="screen_create_room_new_space_title">"New space"</string>
-  <string name="screen_create_room_parent_space_home_description">"(no space)"</string>
-  <string name="screen_create_room_parent_space_home_title">"Home"</string>
   <string name="screen_create_room_private_option_description">"Only people invited can join."</string>
   <string name="screen_create_room_private_option_title">"Private"</string>
   <string name="screen_create_room_public_option_description">"Anyone can find this room.