Implement JNI and objc implementation for icecandidateerror event

This CL adds the callback on ICE Candidate Error to the Android and
the iOS SDKs.

Spec: https://www.w3.org/TR/webrtc/#dom-rtcpeerconnection-onicecandidateerror

Bug: webrtc:13446
Change-Id: I6e511aaa80f1aa8f4310d8518d1144d97470cd7e
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/239460
Reviewed-by: Henrik Andreassson <henrika@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Henrik Andreassson <henrika@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35531}
diff --git a/sdk/android/api/org/webrtc/IceCandidateErrorEvent.java b/sdk/android/api/org/webrtc/IceCandidateErrorEvent.java
new file mode 100644
index 0000000..aae9da7
--- /dev/null
+++ b/sdk/android/api/org/webrtc/IceCandidateErrorEvent.java
@@ -0,0 +1,43 @@
+/*
+ *  Copyright (c) 2021 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+package org.webrtc;
+
+public final class IceCandidateErrorEvent {
+  /** The local IP address used to communicate with the STUN or TURN server. */
+  public final String address;
+  /** The port used to communicate with the STUN or TURN server. */
+  public final int port;
+  /**
+   * The STUN or TURN URL that identifies the STUN or TURN server for which the failure occurred.
+   */
+  public final String url;
+  /**
+   * The numeric STUN error code returned by the STUN or TURN server. If no host candidate can reach
+   * the server, errorCode will be set to the value 701 which is outside the STUN error code range.
+   * This error is only fired once per server URL while in the RTCIceGatheringState of "gathering".
+   */
+  public final int errorCode;
+  /**
+   * The STUN reason text returned by the STUN or TURN server. If the server could not be reached,
+   * errorText will be set to an implementation-specific value providing details about the error.
+   */
+  public final String errorText;
+
+  @CalledByNative
+  public IceCandidateErrorEvent(
+      String address, int port, String url, int errorCode, String errorText) {
+    this.address = address;
+    this.port = port;
+    this.url = url;
+    this.errorCode = errorCode;
+    this.errorText = errorText;
+  }
+}
diff --git a/sdk/android/api/org/webrtc/PeerConnection.java b/sdk/android/api/org/webrtc/PeerConnection.java
index 7ad72c4..468413b 100644
--- a/sdk/android/api/org/webrtc/PeerConnection.java
+++ b/sdk/android/api/org/webrtc/PeerConnection.java
@@ -118,6 +118,9 @@
     /** Triggered when a new ICE candidate has been found. */
     @CalledByNative("Observer") void onIceCandidate(IceCandidate candidate);
 
+    /** Triggered when gathering of an ICE candidate failed. */
+    default @CalledByNative("Observer") void onIceCandidateError(IceCandidateErrorEvent event) {}
+
     /** Triggered when some ICE candidates have been removed. */
     @CalledByNative("Observer") void onIceCandidatesRemoved(IceCandidate[] candidates);