Fix issue with saving admins before finishing loading.

Saving device policy managers settings to clear out
password stats was happening before initializing mAdminList
so could wipe active admins.

Test: manual - flash with N2G05C add google account with dmagent flash wth this fix, check dmagent is still an active admin, reboot check admin is still active.
Test: runtest -c com.android.server.devicepolicy.DevicePolicyManagerTest frameworks-services

Bug: 34277435
Change-Id: I13660b47f30e9aba001eb13f2e457c3b3f36da3e
(cherry picked from commit adbda7474c)

services/devicepolicy/java/com/android/server/devicepolicy/DevicePolicyManagerService.java

@@ -2451,14 +2451,14 @@ public class DevicePolicyManagerService extends IDevicePolicyManager.Stub {
             // Ignore
         }
 
+        // Generate a list of admins from the admin map
+        policy.mAdminList.addAll(policy.mAdminMap.values());
+
         // Might need to upgrade the file by rewriting it
         if (needsRewrite) {
             saveSettingsLocked(userHandle);
         }
 
-        // Generate a list of admins from the admin map
-        policy.mAdminList.addAll(policy.mAdminMap.values());
-
         validatePasswordOwnerLocked(policy);
         updateMaximumTimeToLockLocked(userHandle);
         updateLockTaskPackagesLocked(policy.mLockTaskPackages, userHandle);