[ACTS] Autotest wrapper for ACTS.

Initial check-in of the Autotest wrapper for ACTS.
This can execute basic ACTS tests and report results.

BUG=b:24907406
TEST=Create /usr/local/comms, copy the comms repo here and chmod
it for all users. Edit the sample_config.json file to match your
test station paths. Then run one of:
1) ./test_droid.py ZX1G22JHXN android_ACTS.SampleTest --remote \
   android1758-wifi-test-station-2.cros
2) ./test_droid.py ZX1G22JHXN android_ACTS --remote \
android1758-wifi-test-station-2.cros --args \
"config_file=sample_config.txt test_case=SampleTest test_bed=SampleTestBed"

Change-Id: I128ad22c4eaf738a2cfb8cb2094e0b1052b3705d
Reviewed-on: https://chromium-review.googlesource.com/309911
Commit-Ready: Simran Basi <sbasi@chromium.org>
Tested-by: Simran Basi <sbasi@chromium.org>
Reviewed-by: Simran Basi <sbasi@chromium.org>
diff --git a/global_config.ini b/global_config.ini
index e4ebaa3..da8511e 100644
--- a/global_config.ini
+++ b/global_config.ini
@@ -361,3 +361,7 @@
 # The user is passed to a container through global config file so a process
 # running inside the container can use the same user to make RPC.
 user:
+
+[ACTS]
+# Section for ACTS configuration.
+acts_config_folder: