PRODINFO: Revamp blanking/write disallow policy. (#913)

* exo/fusee: hookup new prodinfo settings

* fusee: new scheme doesn't need FLAGS_DEFAULT

* fusee: fix c/p errors

* ams.mitm: completely revamp prodinfo backup mechanism

* ams.mitm: Implement revamped blanking/write policy

* strat: make early boot more debuggable

* exo: condense flag logic

stratosphere/ams_mitm/source/fs_mitm/fs_mitm_service.hpp

@@ -54,6 +54,11 @@ namespace ams::mitm::fs {
                     return true;
                 }
 
+                /* We want to mitm settings, to intercept CAL0. */
+                if (program_id == ncm::SystemProgramId::Settings) {
+                    return true;
+                }
+
                 /* We want to mitm sdb, to support sd-romfs redirection of common system archives (like system font, etc). */
                 if (program_id == ncm::SystemProgramId::Sdb) {
                     return true;