Add full screen image view

Change-Id: I5b3db9ce4c86788b640a48bafa87cd9e952739d4
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 303cb91..c33ab3d 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -167,6 +167,13 @@
             </intent-filter>
         </activity>
 
+        <activity android:name="com.android.photos.FullscreenViewer"
+                android:label="@string/app_name"
+                android:configChanges="keyboardHidden|orientation|screenSize"
+                android:theme="@style/Theme.Photos.Fullscreen"
+                android:parentActivityName="com.android.photos.GalleryActivity">
+        </activity>
+
          <!-- This activity receives USB_DEVICE_ATTACHED intents and allows importing
          media from attached MTP devices, like cameras and camera phones -->
         <activity android:launchMode="singleInstance"