[nit] tabbing spaces

Author: nan-li

android/src/main/java/com/onesignal/flutter/OneSignalUser.java

@@ -54,10 +54,10 @@ else if (call.method.contentEquals("OneSignal#removeTags"))
 
     private void setLanguage(MethodCall call, Result result) {
         String language = call.argument("language");
-        if (language != null && language.length() == 0)
-          language = null;
-    
-          OneSignal.getUser().setLanguage(language);
+        if (language != null && language.length() == 0) {
+            language = null;
+        }
+        OneSignal.getUser().setLanguage(language);
     }
 
     private void addAliases(MethodCall call, Result result) {
@@ -83,23 +83,24 @@ private void removeAliases(MethodCall call, Result result) {
     private void addEmail(MethodCall call, Result result) {
         OneSignal.getUser().addEmail((String) call.arguments);
         replySuccess(result, null);
-      }
+    }
 
-      private void removeEmail(MethodCall call, Result result) {
+    private void removeEmail(MethodCall call, Result result) {
         OneSignal.getUser().removeEmail((String) call.arguments);
         replySuccess(result, null);
-      }
+    }
 
-      private void addSms(MethodCall call, Result result) {
+    private void addSms(MethodCall call, Result result) {
         OneSignal.getUser().addSms((String) call.arguments);
         replySuccess(result, null);
-      }
+    }
 
-      private void removeSms(MethodCall call, Result result) {
+    private void removeSms(MethodCall call, Result result) {
         OneSignal.getUser().removeSms((String) call.arguments);
         replySuccess(result, null);
-      }
-      private void addTags(MethodCall call, Result result) {
+    }
+
+    private void addTags(MethodCall call, Result result) {
         // call.arguments is being casted to a Map<String, Object> so a try-catch with
         //  a ClassCastException will be thrown
         try {
@@ -118,6 +119,4 @@ private void removeTags(MethodCall call, Result result) {
             replyError(result, "OneSignal", "deleteTags failed with error: " + e.getMessage() + "\n" + e.getStackTrace(), null);
         }
     }
-    
-     
 }