libSceNpFriendListDialog technical debt

sceNpFriendListDialogOpenA (libSceNpFriendListDialog) - with ANYPS5_PSN_DIALOGS=show, a successful open shows AnyPS5's notice that the feature needs PlayStation Network; the console's own display without PlayStation Network is not measured, and the notice wording is AnyPS5's.
libSceNpFriendListDialog - the friend list dialog (sceNpFriendListDialogOpenA and sceNpFriendListDialogGetResultA) runs the common-dialog state machine but shows nothing and reports the user as having cancelled, as there is no PSN friend list. In sceNpFriendListDialogGetResultA, checking for a null result pointer (COMMON_DIALOG_ERROR_ARG_NULL) takes precedence over unfinished state (COMMON_DIALOG_ERROR_NOT_FINISHED), matching native PS5 firmware 13.42 module libSceNpFriendListDialog.sprx disassembly (offset 0xa10) and native export execution data. The signatures are from Orbital's type database; the result layout beyond the leading int32_t result code is not known, so nothing else is written. Returning 0x80B8000D for an unwritable result pointer is a host-safety fallback with console behavior unmeasured.

sceNpFriendListDialogGetResult and sceNpFriendListDialogOpen (libSceNpFriendListDialog) - names and NIDs are present in the PS5 3.20 export inventory, but Orbital has prototypes only for the A variants and no credible prototypes were found for these. The declarations have no parameters solely to resolve known imports; this is not an ABI claim and callers must not call them until signatures are verified