There were two copies of a Nima "player" and this moves them out of
samplecode/ and viewer/ to experimental/ where it is a bit more
accessible (e.g. for WebAssembly).
Bug: skia:
Change-Id: I05419a352f0d13d16b462a374578107513eb1243
Reviewed-on: https://skia-review.googlesource.com/c/166441
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
