Since we don't have proper confuguration file of what to include/exclude
in the backup, this better be disabled because it will lead to unexpected
state. This will solve any issue that was keep hapenning even after fresh
install of the emulator until you manually clear the app data.
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).
1. Allow users to pick games dircetory from external storage.
2. Better UX experince to distinguish between selecting a directory or
a game. The later is needed when we implement change disk for android.
This solves the following issues:
1. If user uninstall Dolphin and install it again the resources will
not be copied unless the user manually clear the app cache because we
are enabling the allowBackup flag in the manifest which will make the app
restore the settings saved in the shared prefernces including the flag
assetsCopied. This PR always copy the files everytime you open Dolphin.
2. If the AssetCopyService took long time and you tried to open the settings
screen or start a game the behaviour was not expected or the emulator will
crash, this PR make sure that whatever we add to the DirectoryInitializationService
or how long it will take will still work as expected by blocking both
the settings screen and the emulaion screen to wait untill all resources
needed are copied.
3. Better communication between the DirectoryInitializationService and the
UI screens using brocast messages.
