Return copy of mEnforcingAdmin from getEnforcingAdminsOnUser

Fixes: 339774909
Flag: EXEMPT bugfix
Test: btest a.d.c.DevicePolicyManagemetRoleHolderTest
Change-Id: I53964d6b936e8c7978da44d0e503af36ddf4f49f

1 files changed, 1 insertions, 1 deletions

diff --git a/services/devicepolicy/java/com/android/server/devicepolicy/DevicePolicyEngine.java b/services/devicepolicy/java/com/android/server/devicepolicy/DevicePolicyEngine.java
index d733762e90e5..6d2c107b5c0d 100644
--- a/services/devicepolicy/java/com/android/server/devicepolicy/DevicePolicyEngine.java
+++ b/services/devicepolicy/java/com/android/server/devicepolicy/DevicePolicyEngine.java
@@ -1553,7 +1553,7 @@ final class DevicePolicyEngine {
     private Set<EnforcingAdmin> getEnforcingAdminsOnUser(int userId) {
         synchronized (mLock) {
             return mEnforcingAdmins.contains(userId)
-                    ? mEnforcingAdmins.get(userId) : Collections.emptySet();
+                    ? new HashSet<>(mEnforcingAdmins.get(userId)) : Collections.emptySet();
         }
     }