In bug 1706656 I marked PermissionDelegateTest#geolocation() to be
skipped when isolated process is enabled, due to noticing that it was
failing. However, this test is still failing intermittently on
try. The reason is that PermissionDelegateTest#autoplayReject() is
actually the test that causes the crash, and the harness incorrectly
reports this as geolocation() failing.
This patch marks the correct test as being skipped.
Differential Revision: https://phabricator.services.mozilla.com/D167255