Added sensor target VTS test

Initial submission of Sensor VTS test, including the following
test cases:

 * SensorListValid
 * NormalAccelerometerStreamingOperation
 * NormalGyroscopeStreamingOperation
 * AccelerometerSamplingPeriodHotSwitchOperation
 * AccelerometerBatchingOperation

One thing to note is that runtime has to be stopped to prevent
sensor service from stealing samples (which causes test failure).

Test: m vts -j32 &&
      adb shell stop &&
      vts-tradefed run commandAndExit vts \
          --skip-all-system-status-check \
          --primary-abi-only \
          --skip-preconditions \
          --module SensorsHidlTargetTest
      vts-tradefed run commandAndExit vts \
          --skip-all-system-status-check \
          --primary-abi-only \
          --skip-preconditions \
          --module SensorsHidlTest
      adb shell start

Test: # alternative, faster way to run target test only
      m sensors_hidl_hal_test -j32  &&
      TOUT=$T/out/target/product/${TARGET_PRODUCT}
      TEST=data/nativetest/sensors_hidl_hal_test/sensors_hidl_hal_test
      adb push ${TOUT}/${TEST} /${TEST} && \
      adb shell ${TEST}

Change-Id: I3e26aa550f4cdec2cebb847f47d63ed33a527210
diff --git a/sensors/1.0/vts/functional/Android.bp b/sensors/1.0/vts/functional/Android.bp
new file mode 100644
index 0000000..675484a
--- /dev/null
+++ b/sensors/1.0/vts/functional/Android.bp
@@ -0,0 +1,33 @@
+//
+// Copyright (C) 2016 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.
+//
+
+cc_test {
+    name: "sensors_hidl_hal_test",
+    gtest: true,
+    srcs: ["sensors_hidl_hal_test.cpp"],
+    shared_libs: [
+        "liblog",
+        "libhidlbase",
+        "libutils",
+        "android.hardware.sensors@1.0",
+    ],
+    static_libs: ["libgtest"],
+    cflags: [
+        "-O0",
+        "-g",
+    ],
+}
+