Make captive portal login app not restart upon device rotation.

Without this fix, rotating the device restarts web browsing
at the first page of captive portal losing any information a
user has already entered.

Bug: 27363244
Change-Id: Ie610f6c7192352eb80acb200d089072cf0197c37
diff --git a/packages/CaptivePortalLogin/AndroidManifest.xml b/packages/CaptivePortalLogin/AndroidManifest.xml
index aea8585..f21fd88 100644
--- a/packages/CaptivePortalLogin/AndroidManifest.xml
+++ b/packages/CaptivePortalLogin/AndroidManifest.xml
@@ -27,7 +27,8 @@
         <activity
             android:name="com.android.captiveportallogin.CaptivePortalLoginActivity"
             android:label="@string/action_bar_label"
-            android:theme="@style/AppTheme" >
+            android:theme="@style/AppTheme"
+            android:configChanges="keyboardHidden|orientation|screenSize" >
             <intent-filter>
                 <action android:name="android.net.conn.CAPTIVE_PORTAL"/>
                 <category android:name="android.intent.category.DEFAULT"/>