Add unit tests for NearbyMetrics.

Change-Id: Id40b0d3be43e4e84df7c359962bd60097d5ebc6c
diff --git a/nearby/tests/unit/Android.bp b/nearby/tests/unit/Android.bp
index 50c395a..851dd08 100644
--- a/nearby/tests/unit/Android.bp
+++ b/nearby/tests/unit/Android.bp
@@ -39,12 +39,17 @@
         "guava",
         "junit",
         "libprotobuf-java-lite",
-        "mockito-target",
+        "mockito-target-extended-minus-junit4",
         "platform-test-annotations",
         "service-nearby",
         "truth-prebuilt",
         // "Robolectric_all-target",
     ],
+    // these are needed for Extended Mockito
+    jni_libs: [
+        "libdexmakerjvmtiagent",
+        "libstaticjvmtiagent",
+    ],
     test_suites: [
         "general-tests",
         "mts-tethering",