Only angle_end2end_tests and angle_unittests to start.
Also adds test expectations for the Pixel 4 end2end_tests.

Patch Series:

1. http://crrev.com/c/2885381
2. http://crrev.com/c/2885346
3. http://crrev.com/c/2885383
4. This CL

Bug: angleproject:5941
Bug: angleproject:5946
Bug: angleproject:5947
Bug: angleproject:5981
Change-Id: Iaaea0b427513804575d0ad7773a81379ea932eb5
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2885384
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>