Replace some gradient .fps with runtime FPs

Change-Id: Ia00f88d00c6010d87c775acd32493673020d5ae8
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/420577
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
24 files changed