Remove --disable-vp10 from vp9 extension configuration.

The option was removed in
https://chromium.googlesource.com/webm/libvpx/+/67edc5e83be285004804c67c5348bbc81503a04d%5E%21/#F2.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=128801977

extensions/vp9/src/main/jni/generate_libvpx_android_configs.sh

@@ -31,7 +31,7 @@ shift 1
 # configuration parameters common to all architectures
 common_params="--disable-examples --disable-docs --enable-realtime-only"
 common_params+=" --disable-vp8 --disable-vp9-encoder --disable-webm-io"
-common_params+=" --disable-vp10 --disable-libyuv --disable-runtime-cpu-detect"
+common_params+=" --disable-libyuv --disable-runtime-cpu-detect"
 
 # configuration parameters for various architectures
 arch[0]="armeabi-v7a"