Add JavaToNativeVideoCodecInfo to native API.

This conversion function is useful for downstream native codecs
which want to take a VideoCodecInfo in the Java wrapper and use it
as a SdpVideoFormat in the C++ object.

Bug: webrtc:9495
Change-Id: Id2ece708eafd4be648fafff9e94aa13ace504bdf
Reviewed-on: https://webrtc-review.googlesource.com/87381
Commit-Queue: Rasmus Brandt <brandtr@webrtc.org>
Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23865}
diff --git a/sdk/android/native_api/codecs/wrapper.h b/sdk/android/native_api/codecs/wrapper.h
index b13f270..b1ff24c 100644
--- a/sdk/android/native_api/codecs/wrapper.h
+++ b/sdk/android/native_api/codecs/wrapper.h
@@ -14,11 +14,15 @@
 #include <jni.h>
 #include <memory>
 
+#include "api/video_codecs/sdp_video_format.h"
 #include "api/video_codecs/video_decoder_factory.h"
 #include "api/video_codecs/video_encoder_factory.h"
 
 namespace webrtc {
 
+// Creates an instance of webrtc::SdpVideoFormat from Java VideoCodecInfo.
+SdpVideoFormat JavaToNativeVideoCodecInfo(JNIEnv* jni, jobject codec_info);
+
 // Creates an instance of webrtc::VideoDecoderFactory from Java
 // VideoDecoderFactory.
 std::unique_ptr<VideoDecoderFactory> JavaToNativeVideoDecoderFactory(