FrameCapture: Don't capture default drawbuffers state. When capturing framebuffers during mid-execution-capture the drawbuffers state is now compared with the default one and skipped when equal. This prevents capturing the unavailable glDrawBuffers call when using OES_framebuffer_object on GLES 1 contexts. Bug: angleproject:6181 Change-Id: Id2076223067dc5f89df88fe6a3a48b09fa9a3f5d Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3068957 Commit-Queue: Lubosz Sarnecki <lubosz.sarnecki@collabora.com> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Cody Northrop <cnorthrop@google.com>