Replace 'leave room' text with 'leave conversation' for DMs (#2231)

* Replace 'leave room' text with 'leave conversation' for DMs

* Add `isDm` property to both `RoomSummary` and `RoomListRoomSummary`

* Remove redundant `leave_conversation_alert_subtitle_*` texts

* Fix maestro flow

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Co-authored-by: ElementBot <benoitm+elementbot@element.io>

libraries/matrix/impl/src/main/kotlin/io/element/android/libraries/matrix/impl/roomlist/RoomSummaryDetailsFactory.kt

@@ -41,6 +41,7 @@ class RoomSummaryDetailsFactory(private val roomMessageFactory: RoomMessageFacto
             inviter = roomInfo.inviter?.let(RoomMemberMapper::map),
             notificationMode = roomInfo.userDefinedNotificationMode?.let(RoomNotificationSettingsMapper::mapMode),
             hasOngoingCall = roomInfo.hasRoomCall,
+            isDm = roomInfo.isDirect && roomInfo.activeMembersCount.toLong() == 2L,
         )
     }
 }