[perf_skottiewasm_lottieweb] Turn on skottie+wasm flush for a better comparison

This enables us to use the same termination checks as for lottie-web.

NoTry: true
Bug: skia:9237
Change-Id: I9d5d0c450196c3800020e12b45868c656cdcc46a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/226858
Commit-Queue: Ravi Mistry <rmistry@google.com>
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
6 files changed