Add script for running UI tests from the command line

Usage:
$ cd tools/idea
$ ant guiTests

Test results are written to build/TEST-*

Change-Id: I5e395e4348eb70ef65ae819277555ee95642bdfb
(cherry picked from commit 7c48b9da9b078f4b7e1282cf906632af9909b7db)
3 files changed