Android: Add helper class VideoFrameDrawer that can render VideoFrames

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

Index: webrtc/sdk/android/api/org/webrtc/RendererCommon.java
diff --git a/webrtc/sdk/android/api/org/webrtc/RendererCommon.java b/webrtc/sdk/android/api/org/webrtc/RendererCommon.java
index 18d96c22e57fdc25ee9ae2f589b6500683a9d327..1491f92fa150bd64202e578ed25ae2ab8536009a 100644
--- a/webrtc/sdk/android/api/org/webrtc/RendererCommon.java
+++ b/webrtc/sdk/android/api/org/webrtc/RendererCommon.java
@@ -83,7 +83,7 @@ public class RendererCommon {
    * Helper class for uploading YUV bytebuffer frames to textures that handles stride > width. This
    * class keeps an internal ByteBuffer to avoid unnecessary allocations for intermediate copies.
    */
-  public static class YuvUploader {
+  static class YuvUploader {
     // Intermediate copy buffer for uploading yuv frames that are not packed, i.e. stride > width.
     // TODO(magjed): Investigate when GL_UNPACK_ROW_LENGTH is available, or make a custom shader
     // that handles stride and compare performance with intermediate copy.
@@ -143,6 +143,10 @@ public class RendererCommon {
       return uploadYuvData(buffer.getWidth(), buffer.getHeight(), strides, planes);
     }
 
+    public int[] getYuvTextures() {
+      return yuvTextures;
+    }
+
     /**
      * Releases cached resources. Uploader can still be used and the resources will be reallocated
      * on first use.