libSceSharePlay technical debt

sceSharePlayInitialize (libSceSharePlay) - the library keeps no state, so the heap is not used. A null heap is accepted: PPSA11386 passes a null heap and 0x1800 bytes and stops on any non-zero result. The error for a zero size is unknown, so it throws

sceSharePlayGetCurrentConnectionInfoA (libSceSharePlay) - reports no Share Play session, as the library keeps none: status 0 (DORMANT), mode 0, empty online IDs, account IDs 0 and both user IDs -1 (SCE_USER_SERVICE_USER_ID_INVALID). A null pointer returns SCE_SHARE_PLAY_ERROR_INVALID_ARGS (0x810E0001). The 72-byte SceSharePlayConnectionInfoA layout and the error code follow KytyPS5 and fpPS4, which agree on both; KytyPS5 sets the user IDs to -1 and fpPS4 leaves them 0, and which one the console returns is not verified. KytyPS5 also returns SCE_SHARE_PLAY_ERROR_NOT_INITIALIZED before sceSharePlayInitialize; this library keeps no initialization state and does not.
sceSharePlayProhibitController (libSceSharePlay) - accepts 0 (allow) and 1 (prohibit) and returns 0, following sharpemu. The setting is not stored, as no Share Play session or visitor controller exists and no export reads it back. sharpemu rejects any other value with its synthetic 0x80020003, not a Share Play code, so other values throw. Like the other exports here it does not require sceSharePlayInitialize. The int argument type and the console's error for other values are unverified