Fix persistent breakage: remove Holo keyword.

Change-Id: I67df2f4b89dda7a31f82246be74ea0062643022c
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 8cfe7b4..42c076b 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -100,10 +100,10 @@
         </activity-alias>
 
         <activity android:name=".wifi.WifiSettingsForSetupWizardXL"
+                  android:theme="@android:style/Theme.NoTitleBar"
                   android:clearTaskOnLaunch="true"
                   android:screenOrientation="landscape"
-                  android:exported="true"
-                  android:theme="@android:style/Theme.Holo.NoTitleBar" />
+                  android:exported="true" />
 
         <activity android:name=".wifi.AdvancedSettings"
                 android:label="@string/wifi_ip_settings_titlebar"