Add icon; Add them colors; Add new page for validate wallet storage; Improve paddings

android/app/src/main/AndroidManifest.xml

@@ -12,7 +12,7 @@
     <application
         android:name="io.flutter.app.FlutterApplication"
         android:label="gecko">
-        <!-- android:icon="@mipmap/launcher_icon"> -->
+        <!-- android:icon="@mipmap/ic_launcher"> -->
         <activity
             android:name=".MainActivity"
             android:launchMode="singleTop"