Move CtsDevicePolicyManagerTestCases to its own group

Rebase from master branch

Bug: 141061952
Test: none
Change-Id: I54d9e1fbaa1bab11581bcd66d55255ae713b1bf6
diff --git a/services/devicepolicy/TEST_MAPPING b/services/devicepolicy/TEST_MAPPING
index a5ee3e2..3d86cf3 100644
--- a/services/devicepolicy/TEST_MAPPING
+++ b/services/devicepolicy/TEST_MAPPING
@@ -1,5 +1,5 @@
 {
-  "presubmit": [
+  "presubmit-devicepolicy": [
     {
       "name": "CtsDevicePolicyManagerTestCases",
       "options": [
@@ -12,7 +12,7 @@
       ]
     }
   ],
-  "postsubmit": [
+  "postsubmit-devicepolicy": [
     {
       "name": "CtsDevicePolicyManagerTestCases"
     }