Show message in call state when the publisher failed

When the HPB is used and the publisher fails (which is a disconnection
that can not be automatically solved by itself) a forced reconnection is
triggered. This restarts the call, so some feedback should be provided
in the UI about it.

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

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

@@ -2089,7 +2089,7 @@ public class CallActivity extends CallBaseActivity {
 
         } else if (peerConnectionEvent.getPeerConnectionEventType() ==
             PeerConnectionEvent.PeerConnectionEventType.PUBLISHER_FAILED) {
-            currentCallStatus = CallStatus.PUBLISHER_FAILED;
+            setCallState(CallStatus.PUBLISHER_FAILED);
             webSocketClient.clearResumeId();
             hangup(false);
         }
@@ -2345,6 +2345,25 @@ public class CallActivity extends CallBaseActivity {
                         }
                     });
                     break;
+                case PUBLISHER_FAILED:
+                    handler.post(() -> {
+                        // No calling sound when the publisher failed
+                        binding.callStates.callStateTextView.setText(R.string.nc_call_reconnecting);
+                        binding.callModeTextView.setText(getDescriptionForCallType());
+                        if (binding.callStates.callStateRelativeLayout.getVisibility() != View.VISIBLE) {
+                            binding.callStates.callStateRelativeLayout.setVisibility(View.VISIBLE);
+                        }
+                        if (binding.gridview.getVisibility() != View.INVISIBLE) {
+                            binding.gridview.setVisibility(View.INVISIBLE);
+                        }
+                        if (binding.callStates.callStateProgressBar.getVisibility() != View.VISIBLE) {
+                            binding.callStates.callStateProgressBar.setVisibility(View.VISIBLE);
+                        }
+                        if (binding.callStates.errorImageView.getVisibility() != View.GONE) {
+                            binding.callStates.errorImageView.setVisibility(View.GONE);
+                        }
+                    });
+                    break;
                 case RECONNECTING:
                     handler.post(() -> {
                         playCallingSound();