Rate limit handling for Dropbox (#6416)

* Added rate limit handling to dropbox

+ some refactor to make the whole file one object

* Added error messages on rate limit reached

+ refactored some popup code to reduce repetition

* Fixed merge error

* Made variables private

* Fixed file upload not working

because of missing override flag for dropbox

* Stop multiplayer refresher if rate limit reached

* Fixed typo

* Various code changes/fixes

- ErrorResponse var name has to be `error` because that's how DropBox's json property is named
- Change FileStorageRateLimitReached exception to store the seconds remaining as its own property instead of in the message
- Use toIntOrNull to avoid setting defaults in two places

* Fixed missed exception message

Co-authored-by: Azzurite <azzurite@gmail.com>

android/src/com/unciv/app/MultiplayerTurnCheckWorker.kt

@@ -15,6 +15,7 @@ import androidx.work.*
 import com.badlogic.gdx.backends.android.AndroidApplication
 import com.unciv.logic.GameInfo
 import com.unciv.logic.GameSaver
+import com.unciv.logic.multiplayer.FileStorageRateLimitReached
 import com.unciv.models.metadata.GameSettings
 import com.unciv.logic.multiplayer.OnlineMultiplayer
 import java.io.FileNotFoundException
@@ -269,6 +270,9 @@ class MultiplayerTurnCheckWorker(appContext: Context, workerParams: WorkerParame
                         foundGame = Pair(gameNames[arrayIndex], gameIds[arrayIndex])
                     }
                     arrayIndex++
+                } catch (ex: FileStorageRateLimitReached) {
+                    // We just break here as configuredDelay is probably enough to wait for the rate limit anyway
+                    break
                 } catch (ex: FileNotFoundException){
                     // FileNotFoundException is thrown by OnlineMultiplayer().tryDownloadGamePreview(gameId)
                     // and indicates that there is no game preview present for this game