[accessibility] Use EXPECT_CHECK_DEATH_WITH to test CHECKs

And use the "DeathTest" suffix for death tests as per Google Test
guidance.

Fixed: 331226146
Change-Id: I78c918e6d84f80a6a3970246cee57104d051a021
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5428411


Auto-Submit: Greg Thompson <grt@chromium.org>
Reviewed-by: Aaron Leventhal <aleventhal@chromium.org>
Commit-Queue: Aaron Leventhal <aleventhal@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1283176}