feat: network type detection. (#156)

* feat: network type detection.

* fix unit test.

* chore: Make the network type consistent with the protocol.

pubspec.lock

@@ -92,6 +92,48 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.16.0"
+  connectivity_plus:
+    dependency: "direct main"
+    description:
+      name: connectivity_plus
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.3.6+1"
+  connectivity_plus_linux:
+    dependency: transitive
+    description:
+      name: connectivity_plus_linux
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.1"
+  connectivity_plus_macos:
+    dependency: transitive
+    description:
+      name: connectivity_plus_macos
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.4"
+  connectivity_plus_platform_interface:
+    dependency: transitive
+    description:
+      name: connectivity_plus_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.1"
+  connectivity_plus_web:
+    dependency: transitive
+    description:
+      name: connectivity_plus_web
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.3"
+  connectivity_plus_windows:
+    dependency: transitive
+    description:
+      name: connectivity_plus_windows
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.2"
   convert:
     dependency: transitive
     description:
@@ -120,6 +162,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.7"
+  dbus:
+    dependency: transitive
+    description:
+      name: dbus
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.7.4"
   device_info_plus:
     dependency: "direct main"
     description:
@@ -296,6 +345,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "5.2.0"
+  nm:
+    dependency: transitive
+    description:
+      name: nm
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.5.0"
   package_config:
     dependency: transitive
     description:
@@ -359,6 +415,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.0.6"
+  petitparser:
+    dependency: transitive
+    description:
+      name: petitparser
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "5.0.0"
   platform:
     dependency: transitive
     description:
@@ -511,6 +574,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.2.0+1"
+  xml:
+    dependency: transitive
+    description:
+      name: xml
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "6.1.0"
   yaml:
     dependency: transitive
     description: