Added the JNI interface to get and set RtpParameters and the maximum bitrate limits.

webrtc/api/java/src/org/webrtc/RtpSender.java

Index: webrtc/api/java/src/org/webrtc/RtpSender.java
diff --git a/webrtc/api/java/src/org/webrtc/RtpSender.java b/webrtc/api/java/src/org/webrtc/RtpSender.java
index 3950a59a2d33d402b229ede2a56bcb27d81c3750..404b693a7e7cc04d1f7bb86b2dd53ebd7ee62a81 100644
--- a/webrtc/api/java/src/org/webrtc/RtpSender.java
+++ b/webrtc/api/java/src/org/webrtc/RtpSender.java
@@ -46,6 +46,14 @@ public class RtpSender {
     return cachedTrack;
   }
 
+  public boolean setParameters(RtpParameters parameters) {
+      return nativeSetParameters(nativeRtpSender, parameters);
+  }
+
+  public RtpParameters getParameters() {
+      return nativeGetParameters(nativeRtpSender);
+  }
+
   public String id() {
     return nativeId(nativeRtpSender);
   }
@@ -64,6 +72,10 @@ public class RtpSender {
   // Will be released in dispose() or setTrack().
   private static native long nativeGetTrack(long nativeRtpSender);
 
+  private static native boolean nativeSetParameters(long nativeRtpSender, RtpParameters parameters);
+
+  private static native RtpParameters nativeGetParameters(long nativeRtpSender);
+
   private static native String nativeId(long nativeRtpSender);
 
   private static native void free(long nativeRtpSender);