Move config_isSafetyCenterLockScreenPendingIntentFixed

To res-export folder.

This resource is not used by Settings, but is exported for external
usage by other apps.

Put it into res-export folder to prevent from accidentally clean ups.

Bug: 234570979
Test: make Settings
Change-Id: Iff2a204a3dc4e97c19ef92997489760c3ed1505a