Remove dependency on SkFloatBits.h from SkFloatingPoint.h.

The helper functions in SkFloatBits have been replaced with
equivalent standard library calls. In modern times, we expect
the compiler to do a good job optimizing calls like `isfinite`
or `isinf` without bit-twiddling.

Change-Id: I83658746207816346bdc03c7d7dfbcb8d772fa1f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/842476
Reviewed-by: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
29 files changed