select answer should be used for outgoing calls.

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/call/model/MxCallImpl.kt

@@ -203,8 +203,9 @@ internal class MxCallImpl(
 
     override fun selectAnswer() {
         Timber.tag(loggerTag.value).v("select answer $callId")
-        if (isOutgoing) return
-        state = CallState.Answering
+        if (isOutgoing) {
+            // This is an outgoing call, select the remote client that answered.
+            // state is still DIALING.
             CallSelectAnswerContent(
                     callId = callId,
                     partyId = ourPartyId,
@@ -215,6 +216,8 @@ internal class MxCallImpl(
                     .also { eventSenderProcessor.postEvent(it) }
         }
 
+    }
+
     override suspend fun transfer(targetUserId: String,
                                   targetRoomId: String?,
                                   createCallId: String?,