Android: Fix in-game settings changes not getting saved

[JosJuice]

EmulationActivity has an instance of Settings. If you go to SettingsActivity from EmulationActivity and change some settings, the changes get saved to disk, but EmulationActivity's Settings instance still contains the old settings in its map of all settings (assuming the EmulationActivity was not killed by the system to save memory). Then, once you're done playing your game and exit EmulationActivity, EmulationActivity calls Settings.saveSettings. This call to saveSettings first overwrites the entire INI file with its map of all settings (which is outdated) in order to save any legacy settings that have changed (which they haven't, since the GUI doesn't let you change legacy settings while a game is running). Then, it asks the new config system to write the most up-to-date values available for non-legacy settings, which should make all the settings be up-to-date again. The problem here is that the new config system would skip writing to disk if no settings changes had been made since the last time we asked it to write to disk (i.e. since SettingsActivity exited).

NB: Calling Settings.loadSettings in EmulationActivity.onResume is not a working solution. I assume this is because SettingsActivity saves its settings in onStop and not onPause.