Move CtsDevicePolicyManagerTestCases to its own group

Bug: 141061952
Test: none
Change-Id: I5b69e69ccd5fdc6b9489e8df25d9444f043a33e6
diff --git a/cmds/locksettings/TEST_MAPPING b/cmds/locksettings/TEST_MAPPING
index c1cba5f..56f5cc0 100644
--- a/cmds/locksettings/TEST_MAPPING
+++ b/cmds/locksettings/TEST_MAPPING
@@ -1,5 +1,5 @@
 {
-    "presubmit": [
+    "presubmit-devicepolicy": [
         {
             "name": "CtsDevicePolicyManagerTestCases",
             "options": [