Closes #12415: Refactor CURRENCY_TYPE to strong enum (#13276)

* closes #12415 CURRENCY_TYPE enum refactor

* reverses unintended change in Linux.cpp

* closes #12415 CurrencyType strong enum

src/openrct2/platform/Android.cpp

@@ -31,7 +31,7 @@ uint16_t platform_get_locale_language()
     return LANGUAGE_ENGLISH_UK;
 }
 
-uint8_t platform_get_locale_currency()
+CurrencyType platform_get_locale_currency()
 {
     return platform_get_currency_value(NULL);
 }