Disable AddItemActivity on Android Go devices.

Android Go doesn't support adding shortcuts to home screen.
Bug: 112904271
Test: Manual test

Change-Id: I28b20d0d9e5b5e7e91c16ca3ea355bb0c3984c42
diff --git a/go/AndroidManifest.xml b/go/AndroidManifest.xml
index 0a9ad7b..0080898 100644
--- a/go/AndroidManifest.xml
+++ b/go/AndroidManifest.xml
@@ -36,16 +36,14 @@
         android:restoreAnyVersion="true"
         android:supportsRtl="true" >
 
-        <!-- Activity for handling PinItemRequest. Only supports shortcuts -->
+        <!-- Activity for handling PinItemRequest is disabled on Android Go. -->
         <activity android:name="com.android.launcher3.dragndrop.AddItemActivity"
             android:theme="@android:style/Theme.DeviceDefault.Light.Dialog.Alert"
             android:excludeFromRecents="true"
             android:autoRemoveFromRecents="true"
             android:label="@string/action_add_to_workspace"
+            android:enabled="false"
             tools:node="replace" >
-            <intent-filter>
-                <action android:name="android.content.pm.action.CONFIRM_PIN_SHORTCUT" />
-            </intent-filter>
         </activity>
 
     </application>