VisualBench: Make the Android SDL app start without cmdline arguments

Make the Android SDL VisualBench start even if it is started without
command-line arguments.

Also makes it start when started by pressing the icon.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1573913008

Review URL: https://codereview.chromium.org/1573913008
1 file changed