Revert "[skif] Remove SK_RESOLVE_FILTERS_BEFORE_RESTORE flag"

This reverts commit 208ac265ca7f23ff8a55521f07b4b092505684ef.

Reason for revert: flutter was still declaring the staging flag in their own build files, which is why it seemed to pass before.

Original change's description:
> [skif] Remove SK_RESOLVE_FILTERS_BEFORE_RESTORE flag
>
> Bug: b/40042615
> Bug: b/40040587
> Change-Id: I58c5cca591895ffb42c675f1b06edeb0daf80b9d
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/795857
> Commit-Queue: Michael Ludwig <michaelludwig@google.com>
> Reviewed-by: Brian Osman <brianosman@google.com>

Bug: b/40042615
Bug: b/40040587
Change-Id: I4afffeeda094a57be27579673575cce69330faf1
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/796343
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: Michael Ludwig <michaelludwig@google.com>
5 files changed