Add video codec AV1 to the deprecated android decoder/encoder wrappers

modifying java enum with new value was overlooked in
https://webrtc-review.googlesource.com/c/src/+/159282

Bug: b/146586166
Change-Id: I2c9d2a7a807a8ddabc2704bf1de7b697c6977a7d
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/162903
Reviewed-by: Alex Glaznev <glaznev@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30125}

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

@@ -139,6 +139,7 @@ public class MediaCodecVideoDecoder {
     VIDEO_CODEC_UNKNOWN,
     VIDEO_CODEC_VP8,
     VIDEO_CODEC_VP9,
+    VIDEO_CODEC_AV1,
     VIDEO_CODEC_H264;
 
     @CalledByNative("VideoCodecType")