In order to hide the status bar and hopefully prevent any layers from
rendering on top of our traces, make all Android tests run fullscreen.

Test: angle_perftests
Bug: angleproject:5937
Change-Id: I649104a7d95b7f056b411e180632524a85b7c4f2
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2880335Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Tim Van Patten <timvp@google.com>
Commit-Queue: Cody Northrop <cnorthrop@google.com>