MD Settings: Add settings-internet-config (WiFi only, no certs)

chrome/browser/resources/settings/internet_page/internet_shared_css.html

 <link rel="import" href="../settings_shared_css.html">
 
 <!-- Common styles for Internet settings. -->
 <dom-module id="internet-shared">
   <template>
     <style include="settings-shared">
       cr-network-icon {
         -webkit-padding-end: var(--settings-box-row-padding);
       }
 
@@ skipping 15 matching lines @@
         align-items: center;
         display: flex;
       }
 
       .button-container paper-button {
         /* Align text edge with trailing margin (12px button padding) */
         -webkit-margin-end: -12px;
         /* 8px spacing between highlight edges. */
         -webkit-margin-start: calc(12px + 8px);
       }
+
+      .title {
+        font-size: 107.69%;  /* 14px / 13px */
+        font-weight: 500;
+      }
     </style>
   </template>
 </dom-module>