Add multiplayer turn sound notification (#6995)

* Refactor: Extract methods & reduce code duplication

* Refactor: Rename Sounds to SoundPlayer

* Refactor: Make UncivSound a data class

As far as I can see, UncivSoundConstants served no purpose

* Refactor: Reorder sounds

* Refactor: Split up ExtensionFunctions and move into own package

* Add multiplayer turn sound notification

* Refactor: Remove unnecessary double translation

* Refactor: Reduce code duplication

* Refactor: No if for boolean logic

android/assets/jsons/translations/template.properties

@@ -602,12 +602,16 @@ Resign =
 Are you sure you want to resign? = 
 You can only resign if it's your turn = 
 [civName] resigned and is now controlled by AI = 
-Last refresh: [time] [timeUnit] ago = 
-Current Turn: [civName] since [time] [timeUnit] ago = 
+Last refresh: [duration] ago = 
+Current Turn: [civName] since [duration] ago = 
 Seconds = 
 Minutes = 
 Hours = 
 Days = 
+[amount] Seconds = 
+[amount] Minutes = 
+[amount] Hours = 
+[amount] Days = 
 Server limit reached! Please wait for [time] seconds = 
 File could not be found on the multiplayer server = 
 Unhandled problem, [errorMessage] = 
@@ -1395,7 +1399,7 @@ Doing this will reset your current user ID to the clipboard contents - are you s
 ID successfully set! = 
 Invalid ID! = 
 
-# Multiplayer options menu
+# Multiplayer options tab
 
 Enable multiplayer status button in singleplayer games = 
 Update status of currently played game every: = 
@@ -1406,7 +1410,12 @@ Check connection to server =
 Awaiting response... = 
 Success! = 
 Failed! = 
-
+Sound notification for when it's your turn in your currently open game: = 
+Sound notification for when it's your turn in any other game: = 
+Notification [number] = 
+Chimes = 
+Choir = 
+[unit] Attack Sound = 
 
 # Mods