Use UICommon's game list code on Android

Deduplicates code, and gets rid of some problems the old code had
(such as: bad performance when calling native functions, only one
disc showing up for multi-disc games, Wii banners being low-res,
unnecessarily much effort being needed for adding more metadata).

Source/Core/UICommon/GameFile.cpp

@@ -78,8 +78,15 @@ const std::string& GameFile::Lookup(DiscIO::Language language,
 const std::string&
 GameFile::LookupUsingConfigLanguage(const std::map<DiscIO::Language, std::string>& strings) const
 {
+#ifdef ANDROID
+  // TODO: Make the Android app load the config at app start instead of emulation start
+  // so that we can access the user's preference here
+  const DiscIO::Language language = DiscIO::Language::English;
+#else
   const bool wii = DiscIO::IsWii(m_platform);
-  return Lookup(SConfig::GetInstance().GetCurrentLanguage(wii), strings);
+  const DiscIO::Language language = SConfig::GetInstance().GetCurrentLanguage(wii);
+#endif
+  return Lookup(language, strings);
 }
 
 GameFile::GameFile(const std::string& path)

Source/Core/UICommon/GameFileCache.cpp

@@ -12,6 +12,7 @@
 #include <mutex>
 #include <string>
 #include <unordered_set>
+#include <utility>
 #include <vector>
 
 #include "Common/ChunkFile.h"
@@ -38,12 +39,25 @@ std::vector<std::string> FindAllGamePaths(const std::vector<std::string>& direct
   return Common::DoFileSearch(directories_to_scan, search_extensions, recursive_scan);
 }
 
+GameFileCache::GameFileCache() : m_path(File::GetUserPath(D_CACHE_IDX) + "gamelist.cache")
+{
+}
+
+GameFileCache::GameFileCache(std::string path) : m_path(std::move(path))
+{
+}
+
 void GameFileCache::ForEach(std::function<void(const std::shared_ptr<const GameFile>&)> f) const
 {
   for (const std::shared_ptr<const GameFile>& item : m_cached_files)
     f(item);
 }
 
+size_t GameFileCache::GetSize() const
+{
+  return m_cached_files.size();
+}
+
 void GameFileCache::Clear()
 {
   m_cached_files.clear();
@@ -179,9 +193,8 @@ bool GameFileCache::Save()
 
 bool GameFileCache::SyncCacheFile(bool save)
 {
-  std::string filename(File::GetUserPath(D_CACHE_IDX) + "gamelist.cache");
   const char* open_mode = save ? "wb" : "rb";
-  File::IOFile f(filename, open_mode);
+  File::IOFile f(m_path, open_mode);
   if (!f)
     return false;
   bool success = false;
@@ -217,7 +230,7 @@ bool GameFileCache::SyncCacheFile(bool save)
   {
     // If some file operation failed, try to delete the probably-corrupted cache
     f.Close();
-    File::Delete(filename);
+    File::Delete(m_path);
   }
   return success;
 }

Source/Core/UICommon/GameFileCache.h

@@ -6,9 +6,7 @@
 
 #include <cstddef>
 #include <functional>
-#include <list>
 #include <memory>
-#include <mutex>
 #include <string>
 #include <vector>
 
@@ -26,8 +24,12 @@ std::vector<std::string> FindAllGamePaths(const std::vector<std::string>& direct
 class GameFileCache
 {
 public:
+  GameFileCache();  // Uses the default path
+  explicit GameFileCache(std::string path);
+
   void ForEach(std::function<void(const std::shared_ptr<const GameFile>&)> f) const;
 
+  size_t GetSize() const;
   void Clear();
 
   // Returns nullptr if the file is invalid.
@@ -49,6 +51,7 @@ private:
   bool SyncCacheFile(bool save);
   void DoState(PointerWrap* p, u64 size = 0);
 
+  std::string m_path;
   std::vector<std::shared_ptr<GameFile>> m_cached_files;
 };