Let footer with learn more become selectable

- Update this attribute after synced with the Switch Access team.

Bug: 149808249
Test: manual test
Change-Id: I8e4fb7738541b4ccbbb5acf643265c78a61f8c45
diff --git a/res/xml/battery_saver_settings.xml b/res/xml/battery_saver_settings.xml
index 6009f6a..29b82ef 100644
--- a/res/xml/battery_saver_settings.xml
+++ b/res/xml/battery_saver_settings.xml
@@ -45,7 +45,7 @@
 
     <com.android.settingslib.widget.FooterPreference
         android:key="battery_saver_footer_preference"
-        android:selectable="false"
+        android:selectable="true"
         android:title="@*android:string/battery_saver_description"
         settings:allowDividerAbove="true"
         settings:searchable="false"/>