Fix strings for Wi-Fi Assistant dialog.

Remove some redundant strings that are no longer needed.

Change-Id: I039839989358efa322bac13129d91f7c764fd387
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 347cace..5457d72 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -1731,7 +1731,7 @@
         </activity>
 
         <activity android:name=".ActiveNetworkScorerDialog"
-                  android:label="@string/network_scorer_application"
+                  android:label="@string/wifi_assistant_title"
                   android:excludeFromRecents="true"
                   android:theme="@*android:style/Theme.Material.Light.Dialog.Alert">
             <intent-filter>