Show participant as soon as found rather than once connected

As the participants that are not connected yet are clearly marked as
such now the participants are shown as soon as they are found rather
than waiting for a connection to be established.

There is a drawback, however; if a participant will never have a
connection (for example, if the HPB is used and that participant does
not have publishing permissions) the participant will be endlessly shown
with the progress bar. Nevertheless, before they were not shown at all,
which was probably even more puzzling.

Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>

app/src/main/java/com/nextcloud/talk/activities/CallActivity.java

@@ -1832,6 +1832,14 @@ public class CallActivity extends CallBaseActivity {
         for (String sessionId : newSessions) {
             Log.d(TAG, "   newSession joined: " + sessionId);
             getOrCreatePeerConnectionWrapperForSessionIdAndType(sessionId, VIDEO_STREAM_TYPE_VIDEO, false);
+
+            runOnUiThread(() -> {
+                setupVideoStreamForLayout(
+                    null,
+                    sessionId,
+                    false,
+                    VIDEO_STREAM_TYPE_VIDEO);
+            });
         }
 
         if (newSessions.size() > 0 && !currentCallStatus.equals(CallStatus.IN_CONVERSATION)) {