Set test_class for java_test test target where it is needed

This make those test target compatible with --nolegacy_bazel_java_test.

--
Change-Id: I2316c9aa53327b417ecce5fd5dab95ec726da11d
Reviewed-on: https://bazel-review.googlesource.com/#/c/2690
MOS_MIGRATED_REVID=112446514
diff --git a/src/test/java/com/google/devtools/build/android/ziputils/BUILD b/src/test/java/com/google/devtools/build/android/ziputils/BUILD
index f05c1a6..643e29e 100644
--- a/src/test/java/com/google/devtools/build/android/ziputils/BUILD
+++ b/src/test/java/com/google/devtools/build/android/ziputils/BUILD
@@ -1,8 +1,8 @@
 java_test(
     name = "ziputils-tests",
     srcs = glob(["*.java"]),
-    args = ["com.google.devtools.build.android.ziputils.AllTests"],
     tags = ["ziputils"],
+    test_class = "com.google.devtools.build.android.ziputils.AllTests",
     deps = [
         "//src/test/java/com/google/devtools/build/lib:testutil",
         "//src/tools/android/java/com/google/devtools/build/android/ziputils:splitter_lib",