attempt to run protologtool-tests as unit tests

Change-Id: I9d6fab03fdb552a788d83035500642c1fa6df76a
Test: presubmit
Bug: 180736967
diff --git a/tools/protologtool/Android.bp b/tools/protologtool/Android.bp
index 56351e3..ea3cd42 100644
--- a/tools/protologtool/Android.bp
+++ b/tools/protologtool/Android.bp
@@ -34,9 +34,13 @@
     srcs: [
         "tests/**/*.kt",
     ],
+    test_options: {
+        unit_test: true,
+    },
     static_libs: [
         "protologtool-lib",
         "junit",
         "mockito",
+        "objenesis",
     ],
 }