android: Use correct tag to define category for CREATE_SHORTCUT intent-filter

src/frontends/android/AndroidManifest.xml

@@ -63,7 +63,7 @@
             android:label="@string/strongswan_shortcut" >
             <intent-filter>
                 <action android:name="android.intent.action.CREATE_SHORTCUT" />
-                <action android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.DEFAULT" />
             </intent-filter>
         </activity>