frame_capture_utils: Do not serialize 0 bindings. Since we are only interested in the difference to non-default states, bindings with a zero ID should not be serialized. This resolves the comparision error in the GetTexLevelParameterTest.* tests. The test now do not need to be skipped. Bug: angleproject:5645 Change-Id: I887bc22b52a201c467c00c42f6ddb3b38895a7c4 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2739726 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Cody Northrop <cnorthrop@google.com> Commit-Queue: Lubosz Sarnecki <lubosz.sarnecki@collabora.com>