autotest: Added the network_ui test suite.

Created a new test suite to run software-only ChromeOS networking UI
tests. No tests should be added to this suite that have a hardware
dependency and some kind of hardware simulation must be used (e.g.
pseudomodem) such that these tests can be successfully run in a VM.

BUG=chromium:264553
TEST=none

Change-Id: I5cd15ae56ee8322256f7f3ca6670fcb43879e0c3
Reviewed-on: https://gerrit.chromium.org/gerrit/63488
Reviewed-by: Prashanth Balasubramanian <beeps@chromium.org>
Commit-Queue: Arman Uguray <armansito@chromium.org>
Tested-by: Arman Uguray <armansito@chromium.org>
diff --git a/suite_scheduler.ini b/suite_scheduler.ini
index 5280ca3..3afef01 100644
--- a/suite_scheduler.ini
+++ b/suite_scheduler.ini
@@ -117,6 +117,12 @@
 branch_specs: >=R29
 pool: suites
 
+[NetworkUI]
+run_on: new_build
+suite: network_ui
+branch_specs: >=R30
+pool: suites
+
 [OncCellSuite]
 run_on: nightly
 suite: onccell