Fix test dependency on EGL initialization elsewhere. The current implementation only works because RegisterContextCompatibilityTests in EGLContextCompatibilityTest.cpp initializes EGL beforehand. Bug: angleproject:7494 Change-Id: I739ea8cdcddb1d8ea37204f5a1fa6c3844620d1c Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3761276 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Auto-Submit: Roman Lavrov <romanl@google.com>