On Android, force allowing it with:

 adb shell setprop debug.angle.feature_overrides_enabled \
   exposeNonConformantExtensionsAndVersions

If enabling multiple features, switch to using settings which
don't have a character limit, but persist across reboots:

 adb shell settings put global angle_egl_features \
   exposeNonConformantExtensionsAndVersions:foo:bar

Test: Fortnite on ANGLE
Bug: b/170755560
Bug: angleproject:5503
Change-Id: I58e3b265daa8ea1f645f47e0971c4454b8ddb3f2
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2570775
Commit-Queue: Cody Northrop <cnorthrop@google.com>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>