Add VTS tests for Context Hub HAL 1.1

Extract some common functionality and add a new test for the newly-added
method in HAL v1.1.

Bug: 135951924
Test: atest VtsHalContexthubV1_0TargetTest \
            VtsHalContexthubV1_1TargetTest
Change-Id: I1cd335d4972bc3242245b2379a7cfa42d1c683a6
diff --git a/contexthub/common/vts/VtsHalContexthubUtils.cpp b/contexthub/common/vts/VtsHalContexthubUtils.cpp
new file mode 100644
index 0000000..5033b41
--- /dev/null
+++ b/contexthub/common/vts/VtsHalContexthubUtils.cpp
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2020 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.
+ */
+
+#include "VtsHalContexthubUtils.h"
+
+#include <chrono>
+#include <future>
+
+namespace android {
+namespace hardware {
+namespace contexthub {
+namespace vts_utils {
+
+using ::android::hardware::contexthub::V1_0::ContextHub;
+using ::android::hardware::contexthub::V1_0::IContexthub;
+
+// Synchronously queries IContexthub::getHubs() and returns the result
+hidl_vec<ContextHub> getHubsSync(IContexthub* hubApi) {
+    hidl_vec<ContextHub> hubList;
+    std::promise<void> barrier;
+
+    hubApi->getHubs([&hubList, &barrier](const hidl_vec<ContextHub>& hubs) {
+        hubList = hubs;
+        barrier.set_value();
+    });
+    barrier.get_future().wait_for(std::chrono::seconds(1));
+
+    return hubList;
+}
+
+}  // namespace vts_utils
+}  // namespace contexthub
+}  // namespace hardware
+}  // namespace android