Clarify Game streaming requirements (section 3.2)

Add the constraints to Cloud Gaming application that allow users
to use the application without accessing any user media resources.

Partial fix for w3c#103

Author: xingri

index.html

@@ -292,6 +292,13 @@ <h4>Game streaming</h4>
            <td>The application must be able to control the jitter buffer and rendering
            delay.</td>
         </tr>
+        <tr>
+           <td>N48</td>
+           <td>The application can operate normally without any user prompts, including camera
+           and microphone permission requests.
+           The application may request user prompts to provide additional services like in-game chatting,
+	   but it is not mandatory to support the application.</td>
+        </tr>
     </tbody>
 </table>
 <p>Experience: Microsoft's Xbox Cloud Gaming and NVIDIA's GeForce NOW are examples of this use case, with media
@@ -1052,6 +1059,11 @@ <h3>Requirements Summary</h3>
            <td>The WebRTC connection can generate signals indicating demands
            for keyframes, and surface those to the application.</td>
         </tr>
+        <tr id="N48">
+           <td>N48</td>
+           <td>An application can operate normally without any user prompts,
+           including camera and microphone permission requests.</td>
+        </tr>
     </tbody>
 </table>
 <p class="note">Requirements N30-N47 have not completed a Call for Consensus (CfC).</p>