Don't enforce this API - it's not sensitive

Also it breaks device manager

b/28512889

Change-Id: I0006461c6a76bc1b7d19f9b07bec35b6807a4f96

services/core/java/com/android/server/MountService.java

@@ -2648,9 +2648,6 @@ class MountService extends IMountService.Stub
      */
     @Override
     public int getPasswordType() {
-        mContext.enforceCallingOrSelfPermission(Manifest.permission.STORAGE_INTERNAL,
-            "no permission to access the crypt keeper");
-
         waitForReady();
 
         final NativeDaemonEvent event;