Load library dependencies in AppRTCMobile.

webrtc/examples/androidapp/src/org/appspot/apprtc/CallActivity.java

Index: webrtc/examples/androidapp/src/org/appspot/apprtc/CallActivity.java
diff --git a/webrtc/examples/androidapp/src/org/appspot/apprtc/CallActivity.java b/webrtc/examples/androidapp/src/org/appspot/apprtc/CallActivity.java
index 87ee8443a68eb52863650cdc59427e09a4436666..39ff303c9913fcd772a8861c580c837213c6ec01 100644
--- a/webrtc/examples/androidapp/src/org/appspot/apprtc/CallActivity.java
+++ b/webrtc/examples/androidapp/src/org/appspot/apprtc/CallActivity.java
@@ -64,6 +64,14 @@ import org.webrtc.VideoRenderer;
 public class CallActivity extends Activity implements AppRTCClient.SignalingEvents,
                                                       PeerConnectionClient.PeerConnectionEvents,
                                                       CallFragment.OnCallEvents {
+  // Fix for devices running old Android versions not finding the libraries.
+  // https://bugs.chromium.org/p/webrtc/issues/detail?id=6751
+  static {
+    System.loadLibrary("c++_shared");
+    System.loadLibrary("boringssl.cr");
+    System.loadLibrary("protobuf_lite.cr");
+  }
+
   public static final String EXTRA_ROOMID = "org.appspot.apprtc.ROOMID";
   public static final String EXTRA_LOOPBACK = "org.appspot.apprtc.LOOPBACK";
   public static final String EXTRA_VIDEO_CALL = "org.appspot.apprtc.VIDEO_CALL";