Migrate Kotlin tests to use mockito-kotlin2.

Test: atest
Bug: 300509464
Flag: No
Change-Id: I5e0d0f1f29d51cdbfacd51f7229afddf8bd66f7e
diff --git a/tests/Android.bp b/tests/Android.bp
index 654edad..582c7fd 100644
--- a/tests/Android.bp
+++ b/tests/Android.bp
@@ -87,6 +87,7 @@
         "androidx.test.espresso.contrib",
         "androidx.test.espresso.intents",
         "androidx.test.uiautomator_uiautomator",
+        "mockito-kotlin2",
         "mockito-target-extended-minus-junit4",
         "launcher_log_protos_lite",
         "truth-prebuilt",