On Android calling `SDL_RenderSetLogicalSize` with dimensions having a different aspect ratio than the screen will cause letterboxing with blinking garbage data in that areas (instead of having black bars). This is annoying and makes the game really hard to play.
This change will make sure that on Android `SDL_RenderSetLogicalSize` will always be called with dimensions where the aspect ratio is the same as the screen to make sure there is no letterboxing.
The only problem with this is that during drawing the adventure map nothing will clear out the areas that would have been letterboxes, so there is an added explicit clear screen command for `totalRedraw()`.
The changes are only applied to Android builds in order not to affect PC builds - but some changes, especially clearing the screen could be easily added to the PC builds as well
When winning the campaign there is a lock that waits for the old server to stop before allowing to continue with restarting the server. While the lock was released on PC builds as the server runs differently on Android this was missed making campaigns always hang the app when you win.
This change adds a new native method that can be called from the Android app to signal that the server has stopped, so the client can continue with requesting a new server and showing the new campaign scenatio screen.
Note: this change alone doesn't fix the bug but it's required for a fix on vcmi-android's side. It doesn't break anything and can be merged before the vcmi-android changes
Zsolt Sz. Sztupák