Enable the Java wrapper to load different .so library.

webrtc/sdk/android/api/org/webrtc/PeerConnectionFactory.java

Index: webrtc/sdk/android/api/org/webrtc/PeerConnectionFactory.java
diff --git a/webrtc/sdk/android/api/org/webrtc/PeerConnectionFactory.java b/webrtc/sdk/android/api/org/webrtc/PeerConnectionFactory.java
index 28b3ca72ab9b98e4f74db5d2a7f80bf3955cfc18..e2c08c1223e5cc4fecad989f17ca6b0502a0b574 100644
--- a/webrtc/sdk/android/api/org/webrtc/PeerConnectionFactory.java
+++ b/webrtc/sdk/android/api/org/webrtc/PeerConnectionFactory.java
@@ -20,8 +20,16 @@ public class PeerConnectionFactory {
   private static volatile boolean nativeLibLoaded;
 
   static {
+    String libraryName = "jingle_peerconnection_so";
     try {
-      System.loadLibrary("jingle_peerconnection_so");
+      Class.forName("org.webrtc.PeerConnectionLibraryDataChannelOnly");
+      libraryName = "jingle_peerconnection_datachannel_only.so";
+    } catch (Exception e) {
+      System.out.println("Failed to load jingle_peerconnection_datachannel_only_so.");
+    }
+
+    try {
+      System.loadLibrary(libraryName);
       nativeLibLoaded = true;
     } catch (UnsatisfiedLinkError t) {
       nativeLibLoaded = false;