Add glGetFloatv and glSamplerParameterf to GrGLInterface.


Bug: skia:13036
Change-Id: Ie15e0c2b0ada468b82bced818eec67c32d70126b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/522100
Auto-Submit: Brian Salomon <bsalomon@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
7 files changed