Restore CAMERA permission to ApiDemos.

Bug: 3512448
Change-Id: I6a80e7f0f9406e084fec9b626abb19cb24b4fe3d
diff --git a/samples/ApiDemos/AndroidManifest.xml b/samples/ApiDemos/AndroidManifest.xml
index c8378d4..54c7621 100644
--- a/samples/ApiDemos/AndroidManifest.xml
+++ b/samples/ApiDemos/AndroidManifest.xml
@@ -40,11 +40,9 @@
 
     <!-- We will request access to the camera, saying we require a camera
          of some sort but not one with autofocus capability. -->
-    <!--
     <uses-permission android:name="android.permission.CAMERA" />
     <uses-feature android:name="android.hardware.camera" />
     <uses-feature android:name="android.hardware.camera.autofocus" android:required="false" />
-    -->
 
     <application android:name="ApiDemosApplication"
             android:label="@string/activity_sample_code"