Need to clear identity when rebooting for FBE.

                        "Emulation not available on device with native FBE");

            }

            final long token = Binder.clearCallingIdentity();

            try {

                final boolean emulateFbe = (flags & StorageManager.DEBUG_EMULATE_FBE) != 0;

                SystemProperties.set(StorageManager.PROP_EMULATE_FBE, Boolean.toString(emulateFbe));

                // Perform hard reboot to kick policy into place

                mContext.getSystemService(PowerManager.class).reboot(null);

            } finally {

                Binder.restoreCallingIdentity(token);

            }

        }

        if ((mask & StorageManager.DEBUG_FORCE_ADOPTABLE) != 0) {