Update FakeVp8Encoder to use GetEncoderInfo

Bug: webrtc:9890
Change-Id: If4b772de45e2a1917c2c1dc8a214bcaa4499bda3
Reviewed-on: https://webrtc-review.googlesource.com/c/111061
Reviewed-by: Sebastian Jansson <srte@webrtc.org>
Commit-Queue: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25661}

test/fake_vp8_encoder.h

diff --git a/test/fake_vp8_encoder.h b/test/fake_vp8_encoder.h
index 8d409c2..a4d63a9 100644
--- a/test/fake_vp8_encoder.h
+++ b/test/fake_vp8_encoder.h
@@ -37,12 +37,12 @@
 
   int32_t Release() override;
 
-  const char* ImplementationName() const override { return "FakeVp8Encoder"; }
-
   Result OnEncodedImage(const EncodedImage& encodedImage,
                         const CodecSpecificInfo* codecSpecificInfo,
                         const RTPFragmentationHeader* fragments) override;
 
+  EncoderInfo GetEncoderInfo() const override;
+
  private:
   void SetupTemporalLayers(const VideoCodec& codec);
   void PopulateCodecSpecific(CodecSpecificInfo* codec_specific,