Remove Android %s from search results

Currently when "Android" is entered in Settings search,
"Android %s" appears in search results.

Removing it from the search results to fix the
issue.

Bug: 356111486
Bug: 359689134
Bug: 365040064
Test: manually verified
Test: atest StorageItemPreferenceControllerTest
Change-Id: I4f8c1fb9d94fb585ed4e84654d8a9b335cd5f748

res/xml/storage_dashboard_fragment.xml

@@ -101,7 +101,8 @@
             android:key="pref_system"
             android:title="@string/storage_os_name"
             android:icon="@drawable/ic_android_vd_theme_24"
-            android:order="202"/>
+            android:order="202"
+            settings:searchable="false"/>
         <com.android.settings.deviceinfo.StorageItemPreference
             android:key="temporary_files"
             android:title="@string/storage_temporary_files"