Add GpuServiceVendorTests

The GpuWorkTracepointTest class checks that the gpu_work_period
tracepoint has the expected format.

Bug: b/214571411
Change-Id: I0d18555276a4354acfc7d6dc3234e646e76d3eb6
diff --git a/services/gpuservice/vts/TEST_MAPPING b/services/gpuservice/vts/TEST_MAPPING
new file mode 100644
index 0000000..b33e962
--- /dev/null
+++ b/services/gpuservice/vts/TEST_MAPPING
@@ -0,0 +1,7 @@
+{
+  "presubmit": [
+    {
+      "name": "GpuServiceVendorTests"
+    }
+  ]
+}