update videoencoder, add scale option, remove motion-blur hack

Change-Id: Ib80852d20384688a161b0f63593debbd7cdb3b42
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/241760
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
Auto-Submit: Mike Reed <reed@google.com>
2 files changed