Android: Allow disabling cover downloading

In case someone wants to be very careful with how much bandwidth
they use or with what data GameTDB.com collects on you.
This is already an option in DolphinQt (though in DolphinQt it
will switch entirely from using covers to banners when turned off).

Source/Core/Core/Config/UISettings.cpp

@@ -9,7 +9,11 @@ namespace Config
 // UI.General
 
 const Info<bool> MAIN_USE_DISCORD_PRESENCE{{System::Main, "General", "UseDiscordPresence"}, true};
+#ifdef ANDROID
+const Info<bool> MAIN_USE_GAME_COVERS{{System::Main, "General", "UseGameCovers"}, true};
+#else
 const Info<bool> MAIN_USE_GAME_COVERS{{System::Main, "General", "UseGameCovers"}, false};
+#endif
 const Info<bool> MAIN_FOCUSED_HOTKEYS{{System::Main, "General", "HotkeysRequireFocus"}, true};
 const Info<bool> MAIN_RECURSIVE_ISO_PATHS{{System::Main, "General", "RecursiveISOPaths"}, false};