ci(audience): shrink xvfb screen to 160x120 for llvmpipe fill rate#761

ImmutableJeffrey wants to merge 1 commit intochore/sdk-318-linux-playmode-xvfbimmutable/unity-immutable-sdk:chore/sdk-318-linux-playmode-xvfbfrom

chore/audience-linux-perf-xvfb-screenimmutable/unity-immutable-sdk:chore/audience-linux-perf-xvfb-screenCopy head branch name to clipboard