TF-1487 Fix run command flutter test

(cherry picked from commit 798b5613d2cc98223c7c236545c244c1499dc982)

rule_filter/pubspec.lock

@@ -296,7 +296,7 @@ packages:
     description:
       path: "."
       ref: upgrade-latest-flutter-version
-      resolved-ref: "75ad24397dee8606a648a1858f6bba009c1aa1d8"
+      resolved-ref: "9be1a7b3b4a8fbe93fa4b8cf12795f8110de0c06"
       url: "https://github.com/linagora/jmap-dart-client.git"
     source: git
     version: "0.0.1"

rule_filter/test/rule_filter/get_rule_filter_method_test.dart

@@ -95,8 +95,7 @@ void main() {
           },
           headers: {
             "accept": "application/json;jmapVersion=rfc-8621",
-            "content-type": "application/json; charset=utf-8",
-            "content-length": 182
+            "content-length": 250
           });
 
       final httpClient = HttpClient(dio);

rule_filter/test/rule_filter/set_rule_filter_method_test.dart

@@ -104,8 +104,7 @@ void main() {
           },
           headers: {
             "accept": "application/json;jmapVersion=rfc-8621",
-            "content-type": "application/json; charset=utf-8",
-            "content-length": 340
+            "content-length": 753
           });
 
       final setRuleFilterMethod = SetRuleFilterMethod(AccountId(Id(