Encoding constructor should be public.

Bug: webrtc:11157
Change-Id: Ic921b39c0aa6b24deef8452ec28352c16c193a1e
TBR: sakal@webrtc.org
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/161151
Commit-Queue: Amit Hilbuch <amithi@webrtc.org>
Reviewed-by: Steve Anton <steveanton@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29990}

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

@@ -52,7 +52,7 @@ public class RtpParameters {
     public Long ssrc;
 
     // This constructor is useful for creating simulcast layers.
-    Encoding(String rid, boolean active, Double scaleResolutionDownBy) {
+    public Encoding(String rid, boolean active, Double scaleResolutionDownBy) {
       this.rid = rid;
       this.active = active;
       this.scaleResolutionDownBy = scaleResolutionDownBy;