Add a helper for device tests to remove duplicates

Test: atest MicrodroidTests MicrodroidBenchmarks
Change-Id: I0983c0d6dd21a9eab1be2bf8ee78823e3614f646
diff --git a/tests/benchmark/Android.bp b/tests/benchmark/Android.bp
index f333d03..e6d5b83 100644
--- a/tests/benchmark/Android.bp
+++ b/tests/benchmark/Android.bp
@@ -9,6 +9,7 @@
     ],
     srcs: ["src/java/**/*.java"],
     static_libs: [
+        "MicroroidDeviceTestHelper",
         "androidx.test.runner",
         "androidx.test.ext.junit",
         "truth-prebuilt",