More UI tweaks.

* Grab a full wakelock while encrypting.
* Fix a bug with failed attempts.
* Add a custom theme to animate the screen to black.
* Fix the keyboard to be displayed properly in landscape and portrait.

Change-Id: Icc2d813ce1780588eb3b16f5204c3c60cae5236f

res/layout/crypt_keeper_status.xml

@@ -23,10 +23,7 @@
         android:orientation="vertical"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginLeft="140dip"
-        android:layout_marginTop="20dip"
-        android:gravity="left"
-        >
+>
 
     <com.android.internal.widget.DigitalClock android:id="@+id/time"
         android:layout_width="wrap_content"