Tests: Add LEGO Legacy trace Requires GL_EXT_shadow_samplers which is not exposed by Qualcomm's native driver on Pixel 4 XL. Test: angle_perftests --gtest_filter="*lego_legacy*" Bug: b/161716126 Bug: angleproject:5373 Bug: angleproject:5374 Change-Id: Ifff9c5e878b7fe9a3ade684ae5f8e57167f01a25 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2477441 Commit-Queue: Cody Northrop <cnorthrop@google.com> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com>