Remove all multidisplay functionality in the Touch Latency sample app, for now.
Also update to newer gradle versions, to allow editing in Studio.

Bug: 279471411
Test: Manual. Build and run from both command line & Studio. Test overflow menu doesn't show option to select another display.

Change-Id: Ib9c75b52509ce72aae69845caf9b031d221846ed
10 files changed