Add LOCAL_LICENSE_KINDS to frameworks/rs

Added SPDX-license-identifier-Apache-2.0 to:
  tests/java_api/RSUnitTests/Android.bp

Bug: 68860345
Bug: 151177513
Bug: 151953481

Test: m all

Change-Id: I7199a85c8d6353617253d65a9f29789c84f1822f
diff --git a/tests/java_api/RSUnitTests/Android.bp b/tests/java_api/RSUnitTests/Android.bp
index a661df1..7d35d9f 100644
--- a/tests/java_api/RSUnitTests/Android.bp
+++ b/tests/java_api/RSUnitTests/Android.bp
@@ -14,6 +14,11 @@
 // limitations under the License.
 //
 
+package {
+    // See: http://go/android-license-faq
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
 filegroup {
     name: "RSUnitTests_java_srcs",
     srcs: [