[Kernel] Store earned achievements in-memory to prevent achievements spam

This doesn't store them externally so after restarting they will unlock again

src/xenia/kernel/achievement_manager.cc

@@ -22,10 +22,14 @@ DECLARE_int32(user_language);
 namespace xe {
 namespace kernel {
 
-AchievementManager::AchievementManager(){};
+AchievementManager::AchievementManager() { unlocked_achievements.clear(); };
 
 void AchievementManager::EarnAchievement(uint64_t xuid, uint32_t title_id,
                                          uint32_t achievement_id) {
+  if (IsAchievementUnlocked(achievement_id)) {
+    return;
+  }
+
   const Emulator* emulator = kernel_state()->emulator();
   ui::WindowedAppContext& app_context =
       kernel_state()->emulator()->display_window()->app_context();
@@ -48,6 +52,7 @@ void AchievementManager::EarnAchievement(uint64_t xuid, uint32_t title_id,
       const std::string description =
           fmt::format("{}G - {}", entry.gamerscore, label);
 
+      unlocked_achievements[achievement_id] = Clock::QueryHostSystemTime();
       // Even if we disable popup we still should store info that this
       // achievement was earned.
       if (!cvars::show_achievement_notification) {
@@ -63,5 +68,20 @@ void AchievementManager::EarnAchievement(uint64_t xuid, uint32_t title_id,
   }
 }
 
+bool AchievementManager::IsAchievementUnlocked(uint32_t achievement_id) {
+  auto itr = unlocked_achievements.find(achievement_id);
+
+  return itr != unlocked_achievements.cend();
+}
+
+uint64_t AchievementManager::GetAchievementUnlockTime(uint32_t achievement_id) {
+  auto itr = unlocked_achievements.find(achievement_id);
+  if (itr == unlocked_achievements.cend()) {
+    return 0;
+  }
+
+  return itr->second;
+}
+
 }  // namespace kernel
 }  // namespace xe