The initial implementation called eglInitialize() and eglTerminate()
and didn't call ANGLETest::TearDown().

BUG=angleproject:2511

Change-Id: I563a84a72fe9bd20739519301023062f85446557
Reviewed-on: https://chromium-review.googlesource.com/c/1452529Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Ian Elliott <ianelliott@google.com>