Add a dialog when turning off oem unlock dialog.

Change-Id: I93a93c0a110c2770d3701b5449c7939f941c7593
Fixes: 28199132
Test: robotests

src/com/android/settings/development/OemUnlockPreferenceController.java

@@ -90,6 +90,7 @@ public class OemUnlockPreferenceController extends DeveloperOptionsPreferenceCon
             }
         } else {
             mOemLockManager.setOemUnlockAllowedByUser(false);
+            OemLockInfoDialog.show(mFragment);
         }
         return true;
     }