Update FYI bot config for parallel telemetry unit tests

CL https://crrev.com/902763002/ enables parallel telemetry unit tests. This CL will test how it works on FYI bot "Android Tests (K N5, user build)(dbg)" http://build.chromium.org/p/chromium.fyi/builders/Android%20Tests%20(K%20N5%2C%20user%20build)(dbg)

BUG=379378

Review URL: https://codereview.chromium.org/941793002

Cr-Commit-Position: refs/heads/master@{#318953}

build/android/buildbot/bb_device_steps.py

@@ -218,7 +218,7 @@ def RunTelemetryTests(options, step_name, run_tests_path):
   args = ['--browser', 'android-chrome-shell']
   devices = android_commands.GetAttachedDevices()
   if devices:
-    args = args + ['--device', devices[0]]
+    args = args + ['--device', 'android']
   bb_annotations.PrintNamedStep(step_name)
   RunCmd([run_tests_path] + args)