Add search index for support dashboard activity.

Change-Id: Ie9cf20316f94454a3d41f76d05b662e398c2c2ea
Fix: 36005923
Test: make RunSettingsRoboTests
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 7dd42df..4efabab 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -3013,7 +3013,7 @@
                        android:resource="@string/system_dashboard_summary"/>
         </activity>
 
-        <activity android:name=".dashboard.SupportDashboardActivity"
+        <activity android:name=".support.SupportDashboardActivity"
                   android:label="@string/page_tab_title_support"
                   android:icon="@drawable/ic_help"
                   android:theme="@android:style/Theme.NoDisplay"