bluetooth: test LE Discovery

BUG=chromium:439654
TEST=test_that $IP bluetooth_Sanity_LEDiscovery

Change-Id: I677fa9e3cd9bd12b5bde280152549db9adcb8ec8
Reviewed-on: https://chromium-review.googlesource.com/233721
Reviewed-by: Scott James Remnant <keybuk@chromium.org>
Commit-Queue: Scott James Remnant <keybuk@chromium.org>
Tested-by: Scott James Remnant <keybuk@chromium.org>
diff --git a/server/cros/bluetooth/bluetooth_tester.py b/server/cros/bluetooth/bluetooth_tester.py
index 1fdffd3..c2e3178 100644
--- a/server/cros/bluetooth/bluetooth_tester.py
+++ b/server/cros/bluetooth/bluetooth_tester.py
@@ -82,6 +82,17 @@
         return json.loads(self._proxy.read_info())
 
 
+    def set_advertising(self, advertising):
+        """Set the whether the controller is advertising via LE.
+
+        @param advertising: Whether controller should advertise via LE.
+
+        @return True on success, False otherwise.
+
+        """
+        return self._proxy.set_advertising(advertising)
+
+
     def discover_devices(self, br_edr=True, le_public=True, le_random=True):
         """Discover remote devices.