Use new gradle in internal test script

Bug: b/270105162
Change-Id: I16bb6fcc4a8cff301d46d10c8cbfa88039d7478b
diff --git a/tools/internal_test.py b/tools/internal_test.py
index cde66d3..2ca50f3 100755
--- a/tools/internal_test.py
+++ b/tools/internal_test.py
@@ -112,7 +112,7 @@
 # TODO(b/210982978): Enable testing of min xmx again
 TEST_COMMANDS = [
     # Make sure we have a clean build to not be polluted by old test files
-    ['tools/gradle.py', 'clean'],
+    ['tools/gradle.py', 'clean', '--new-gradle'],
     # Run test.py internal testing.
     ['tools/test.py', '--only_internal', '--slow_tests',
      '--java_max_memory_size=8G'],
@@ -362,7 +362,7 @@
   env['R8_GRADLE_CORES_PER_FORK'] = '5'
   failed = any([execute(cmd, archive, env) for cmd in TEST_COMMANDS])
   # Gradle daemon occasionally leaks memory, stop it.
-  gradle.RunGradle(['--stop'])
+  gradle.RunGradle(['--stop'], new_gradle=True)
   archive_status(1 if failed else 0)
   return failed