[SkContext] Begin adding SkCapture Functionality

This Cl begins to add fEnableCapture to SkContextOptions and fCaptureManager to SkContext

Change-Id: I0041ed2929398b43ef96f1a8728ab129ff593d4d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/1379116
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Alexis Cruz-Ayala <alexisdavidc@google.com>