Apply new min & max name policy

lib/models/server_config.dart

@@ -112,6 +112,23 @@ class ConversationsPolicy {
         assert(maxLogoHeight != null);
 }
 
+class AccountInformationPolicy {
+  final int minFirstNameLength;
+  final int maxFirstNameLength;
+  final int minLastNameLength;
+  final int maxLastNameLength;
+
+  const AccountInformationPolicy({
+    @required this.minFirstNameLength,
+    @required this.maxFirstNameLength,
+    @required this.minLastNameLength,
+    @required this.maxLastNameLength,
+  })  : assert(minFirstNameLength != null),
+        assert(maxFirstNameLength != null),
+        assert(minLastNameLength != null),
+        assert(maxLastNameLength != null);
+}
+
 class ServerConfig {
   final Version minSupportedMobileVersion;
   final String termsURL;
@@ -121,6 +138,7 @@ class ServerConfig {
   final PasswordPolicy passwordPolicy;
   final ServerDataConservationPolicy dataConservationPolicy;
   final ConversationsPolicy conversationsPolicy;
+  final AccountInformationPolicy accountInformationPolicy;
 
   const ServerConfig({
     @required this.minSupportedMobileVersion,
@@ -131,6 +149,7 @@ class ServerConfig {
     @required this.passwordPolicy,
     @required this.dataConservationPolicy,
     @required this.conversationsPolicy,
+    @required this.accountInformationPolicy,
   })  : assert(minSupportedMobileVersion != null),
         assert(termsURL != null),
         assert(playStoreURL != null),
@@ -138,5 +157,6 @@ class ServerConfig {
         assert(notificationsPolicy != null),
         assert(passwordPolicy != null),
         assert(dataConservationPolicy != null),
-        assert(conversationsPolicy != null);
+        assert(conversationsPolicy != null),
+        assert(accountInformationPolicy != null);
 }