Revert "Add bindings for simulcast and RIDs in Android SDK."

This reverts commit 177670afd6d4aa414e4aa75983da538b7f350ee8.

Reason for revert: Fails android_instrumentation_test_apk:
https://ci.chromium.org/p/webrtc/builders/ci/Android64%20(M%20Nexus5X)/11553

Original change's description:
> Add bindings for simulcast and RIDs in Android SDK.
>
> This adds the bindings for rid in RtpParameters.Encoding and bindings
> for send_encodings in RtpTransceiverInit to allow creating a transceiver
> with multiple send encodings.
>
> Bug: webrtc:10464
> Change-Id: I4c205dc0f466768c63b7efcb3c68e93277236da0
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/128960
> Reviewed-by: Magnus Jedvert <magjed@webrtc.org>
> Reviewed-by: Seth Hampson <shampson@webrtc.org>
> Commit-Queue: Amit Hilbuch <amithi@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#27323}

TBR=magjed@webrtc.org,shampson@webrtc.org,amithi@webrtc.org

Change-Id: Id6c4e2d41c3c2fbfad31baed907cfa73d82ef14a
No-Tree-Checks: True
No-Try: True
Bug: webrtc:10464
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/130466
Commit-Queue: Oleh Prypin <oprypin@webrtc.org>
Reviewed-by: Oleh Prypin <oprypin@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27354}
diff --git a/sdk/android/api/org/webrtc/RtpParameters.java b/sdk/android/api/org/webrtc/RtpParameters.java
index 56d39ee..5fe36ef 100644
--- a/sdk/android/api/org/webrtc/RtpParameters.java
+++ b/sdk/android/api/org/webrtc/RtpParameters.java
@@ -12,7 +12,6 @@
 
 import android.support.annotation.Nullable;
 import java.lang.Double;
-import java.lang.String;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
@@ -29,9 +28,6 @@
  */
 public class RtpParameters {
   public static class Encoding {
-    // If non-null, this represents the RID that identifies this encoding layer.
-    // RIDs are used to identify layers in simulcast.
-    @Nullable public String rid;
     // Set to true to cause this encoding to be sent, and false for it not to
     // be sent.
     public boolean active = true;
@@ -52,17 +48,9 @@
     // Can't be changed between getParameters/setParameters.
     public Long ssrc;
 
-    // This constructor is useful for creating simulcast layers.
-    Encoding(String rid, boolean active, Double scaleResolutionDownBy) {
-      this.rid = rid;
-      this.active = active;
-      this.scaleResolutionDownBy = scaleResolutionDownBy;
-    }
-
     @CalledByNative("Encoding")
-    Encoding(String rid, boolean active, Integer maxBitrateBps, Integer minBitrateBps,
-        Integer maxFramerate, Integer numTemporalLayers, Double scaleResolutionDownBy, Long ssrc) {
-      this.rid = rid;
+    Encoding(boolean active, Integer maxBitrateBps, Integer minBitrateBps, Integer maxFramerate,
+        Integer numTemporalLayers, Double scaleResolutionDownBy, Long ssrc) {
       this.active = active;
       this.maxBitrateBps = maxBitrateBps;
       this.minBitrateBps = minBitrateBps;
@@ -72,12 +60,6 @@
       this.ssrc = ssrc;
     }
 
-    @Nullable
-    @CalledByNative("Encoding")
-    String getRid() {
-      return rid;
-    }
-
     @CalledByNative("Encoding")
     boolean getActive() {
       return active;