Disable cts-verifier tests that VR Standalone headsets do not support.

Daydream standalone headsets do not support alarm clock, car dock
and screen pinning features and as a result we should disable these
tests from even showing up on cts-verifier.
For standalone headsets they have their uimode set to "vrheadset" and
the resource values-vrheadset is parsed for disabled tests.

Reference:
https://developer.android.com/guide/topics/resources/providing-resources.html#UiModeQualifier

Bug:67114166
Bug:67323786
Bug:67779618
Test: CTS builds, the test cases no longer show up after am start -n
com.android.cts.verifier/.CtsVerifierActivity launches the set of tests.

Change-Id: Ie882f8501ad8e8c95155e2c80ced488a280d6188
diff --git a/apps/CtsVerifier/res/values-vrheadset/strings.xml b/apps/CtsVerifier/res/values-vrheadset/strings.xml
new file mode 100644
index 0000000..c92038d
--- /dev/null
+++ b/apps/CtsVerifier/res/values-vrheadset/strings.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2014 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<resources>
+    <!-- Don't test these features on VR Standalone Headsets. -->
+    <string-array name="disabled_tests">
+        <item>com.android.cts.verifier.car.CarDockActivity</item>
+        <item>com.android.cts.verifier.car.CarDockTestActivity</item>
+        <item>com.android.cts.verifier.deskclock.DeskClockTestsActivity</item>
+        <item>com.android.cts.verifier.screenpinning.ScreenPinningTestActivity</item>
+    </string-array>
+</resources>
\ No newline at end of file