Move OSUD_LANGUAGE to OneSignalCommonDefines.h

* Move OSUD_LANGUAGE const to OneSignalCommonDefines.h
* OSUD_LANGUAGE const is used in OSUserStateSynchronizer as well. Importing LanguageContext.h would be an additional unnecessary step.

Author: tanaynigam

iOS_SDK/OneSignalSDK/Source/LanguageContext.h

@@ -28,9 +28,6 @@
 #import <Foundation/Foundation.h>
 #import "LanguageProvider.h"
 
-#define OSUD_LANGUAGE                                                       @"OSUD_LANGUAGE"                                                    // * OSUD_LANGUAGE
-#define DEFAULT_LANGUAGE                                                    @"en"                                                               // * OSUD_LANGUAGE
-
 NS_ASSUME_NONNULL_BEGIN
 
 @interface LanguageContext : NSObject

iOS_SDK/OneSignalSDK/Source/OneSignalCommonDefines.h

@@ -60,6 +60,8 @@
 #define OSUD_USES_PROVISIONAL_PUSH_AUTHORIZATION                            @"ONESIGNAL_USES_PROVISIONAL_PUSH_AUTHORIZATION"                    // * OSUD_USES_PROVISIONAL_PUSH_AUTHORIZATION
 #define OSUD_PERMISSION_EPHEMERAL_TO                                        @"OSUD_PERMISSION_EPHEMERAL_TO"                                     // * OSUD_PERMISSION_EPHEMERAL_TO
 #define OSUD_PERMISSION_EPHEMERAL_FROM                                      @"OSUD_PERMISSION_EPHEMERAL_FROM"                                   // * OSUD_PERMISSION_EPHEMERAL_FROM
+#define OSUD_LANGUAGE                                                       @"OSUD_LANGUAGE"                                                    // * OSUD_LANGUAGE
+#define DEFAULT_LANGUAGE                                                    @"en"                                                               // * OSUD_LANGUAGE
 // Player
 #define OSUD_EXTERNAL_USER_ID                                               @"OS_EXTERNAL_USER_ID"                                              // * OSUD_EXTERNAL_USER_ID
 #define OSUD_PLAYER_ID_TO                                                   @"GT_PLAYER_ID"                                                     // * OSUD_PLAYER_ID_TO