Create flutter checkouts from scratch

The trybot failed on this whitespace change: https://skia-review.googlesource.com/c/skia/+/244305
But succeeded here.

Bug: skia:9994
Change-Id: I26442ed321ac343609869f6936ff2a98f145d302
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/274863
Reviewed-by: Eric Boren <borenet@google.com>
Commit-Queue: Ravi Mistry <rmistry@google.com>
3 files changed