[Fuchsia] Create/Reorganize documentation for Fuchsia

Put Fuchsia specific instructions in //docs/fuchsia
Added instructions for running blink and gpu integration tests.
Added instructions for running tests on remote devices.

Bug: 1174296
Change-Id: I54fabb5b339fe90b3517c6341c62d7269726772f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2673628
Reviewed-by: Sharon Yang <yangsharon@chromium.org>
Reviewed-by: Bob Haarman <inglorion@chromium.org>
Reviewed-by: Fabrice de Gans-Riberi <fdegans@chromium.org>
Auto-Submit: Chong Gu <chonggu@google.com>
Commit-Queue: Chong Gu <chonggu@google.com>
Cr-Commit-Position: refs/heads/master@{#854575}
GitOrigin-RevId: 4749ec115523e43b395d2556679b59bf2b0c5217
1 file changed