[FPF] Move feature flag and export from components

Skipping presubmit due to script error https://g-issues.chromium.org/issues/335679129

No-Presubmit: true
Bug: 40280666
Change-Id: I61dab9f3d90b50c08501ee4a97f1553dfe200cc7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5445017


Commit-Queue: Patricia Alfonso <trishalfonso@google.com>
Reviewed-by: Avi Drissman <avi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#12894931}