chore(PSVita): restrict OldSdk to PSVita

Minecraft.Client/PSVita/OldSdk.cpp

@@ -1,5 +1,5 @@
 #include "OldSdk.h"
-
+#ifdef __PSVITA__
 
 int sceNpBasicGetFriendOnlineStatus(const SceNpId *friendId, SceNpBasicOnlineStatus *status) {
 	if (status) *status = SCE_NP_BASIC_ONLINE_STATUS_UNKNOWN;
@@ -48,4 +48,5 @@ int sceNpBasicGetRequestedFriendRequestEntries(unsigned int startIndex, SceNpId
 
 SceInt32 sceAppUtilAppEventParseNpBasicJoinablePresence(const SceAppUtilAppEventParam *eventParam, SceAppUtilNpBasicJoinablePresenceParam *param) {
 	return -1;
-}
+}
+#endif