Adapt to new DM definition changes in the SDK (#6748)

* Set `DmRoomDefinition.TwoPeople` in `ClientBuilder`. This applies the 'direct and with at most 2 non-service members' rule to what the SDK should consider a DM.

* Map `RoomInfo.isDm` from the SDK

* Map `NotificationData.isDm` from `NotificationInfo.roomInfo.isDm`

* Remove `RoomIsDmCheck` file as its extension functions are now redundant. Move `Room.isDm` helper function to `BaseRoom`.

* Map `isDm` in `SpaceRoom` from the SDK too

* Replace `isDirect` with `isDm` where possible

* Map `RoomMember.isServiceMember` from the SDK and use it to tell apart normal members of a room from service members (i.e. `RoomMembersState.getDirectRoomMember`)

features/invitepeople/impl/src/test/kotlin/io/element/android/features/invitepeople/impl/DefaultInvitePeoplePresenterTest.kt

@@ -540,7 +540,7 @@ internal class DefaultInvitePeoplePresenterTest {
     }
 
     @Test
-    fun `present - suggestions are loaded from recent direct rooms`() = runTest {
+    fun `present - suggestions are loaded from recent DM rooms`() = runTest {
         val dmRoomId = RoomId("!dm_room:server.org")
         val otherUserId = UserId("@frank:server.org")
         val matrixClient = FakeMatrixClient(sessionId = A_USER_ID).apply {
@@ -554,7 +554,7 @@ internal class DefaultInvitePeoplePresenterTest {
                     roomId = dmRoomId,
                     initialRoomInfo = aRoomInfo(
                         id = dmRoomId,
-                        isDirect = true,
+                        isDm = true,
                         activeMembersCount = 2,
                         currentUserMembership = CurrentUserMembership.JOINED,
                     ),
@@ -591,7 +591,7 @@ internal class DefaultInvitePeoplePresenterTest {
                     roomId = dmRoomId,
                     initialRoomInfo = aRoomInfo(
                         id = dmRoomId,
-                        isDirect = true,
+                        isDm = true,
                         activeMembersCount = 2,
                         currentUserMembership = CurrentUserMembership.JOINED,
                     ),