Add ice_candidate_pool_size to Obj-C and Java RTCConfiguration.

webrtc/sdk/objc/Framework/Classes/RTCConfiguration.mm

Index: webrtc/sdk/objc/Framework/Classes/RTCConfiguration.mm
diff --git a/webrtc/sdk/objc/Framework/Classes/RTCConfiguration.mm b/webrtc/sdk/objc/Framework/Classes/RTCConfiguration.mm
index 0a63f69fd9819efb4cd1945c63b290e8eaa057a1..0ea17e0d9c196f2372b233b4e643253954d74166 100644
--- a/webrtc/sdk/objc/Framework/Classes/RTCConfiguration.mm
+++ b/webrtc/sdk/objc/Framework/Classes/RTCConfiguration.mm
@@ -31,6 +31,7 @@
 @synthesize iceBackupCandidatePairPingInterval =
     _iceBackupCandidatePairPingInterval;
 @synthesize keyType = _keyType;
+@synthesize iceCandidatePoolSize = _iceCandidatePoolSize;
 
 - (instancetype)init {
   if (self = [super init]) {
@@ -54,13 +55,14 @@
     _iceBackupCandidatePairPingInterval =
         config.ice_backup_candidate_pair_ping_interval;
     _keyType = RTCEncryptionKeyTypeECDSA;
+    _iceCandidatePoolSize = config.ice_candidate_pool_size;
   }
   return self;
 }
 
 - (NSString *)description {
   return [NSString stringWithFormat:
-      @"RTCConfiguration: {\n%@\n%@\n%@\n%@\n%@\n%@\n%d\n%d\n%d\n}\n",
+      @"RTCConfiguration: {\n%@\n%@\n%@\n%@\n%@\n%@\n%d\n%d\n%d\n%d\n}\n",
       _iceServers,
       [[self class] stringForTransportPolicy:_iceTransportPolicy],
       [[self class] stringForBundlePolicy:_bundlePolicy],
@@ -70,7 +72,8 @@
           stringForContinualGatheringPolicy:_continualGatheringPolicy],
       _audioJitterBufferMaxPackets,
       _iceConnectionReceivingTimeout,
-      _iceBackupCandidatePairPingInterval];
+      _iceBackupCandidatePairPingInterval,
+      _iceCandidatePoolSize];
 }
 
 #pragma mark - Private
@@ -111,6 +114,7 @@
     }
     nativeConfig->certificates.push_back(certificate);
   }
+  nativeConfig->ice_candidate_pool_size = _iceCandidatePoolSize;
 
   return nativeConfig.release();
 }