core-tests: Add test xml.

Adding a test xml for core-tests.

Bug: 71899243
Test: Verified the config got installed with 'make core-tests -j'
Test: atest libcore/luni/src/test/java/libcore/javax/net/ssl/SSLSocketTest.java
Change-Id: Ia1a732604b66afe37d4687a1df1b848481b59549
diff --git a/JavaLibrary.bp b/JavaLibrary.bp
index a728d61..15ded36 100644
--- a/JavaLibrary.bp
+++ b/JavaLibrary.bp
@@ -363,6 +363,8 @@
             "-Xep:ComparisonOutOfRange:ERROR",
         ],
     },
+
+    test_config: "AndroidTest-core-tests.xml",
 }
 
 // Make the core-ojtests library.