EGLProtectedContentTest: move sleep behind compile-time var Multiple tests with multiple steps wasting ~20s in automated runs Bug: b/333113001 Change-Id: I494f6e3ea373945ad79edbc23eb267dfef71ef87 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5440412 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Auto-Submit: Roman Lavrov <romanl@google.com>