Fix 6247249: make sure label on tablets is "done" instead of "next"

This fixes a bug where the password/PIN unlock screen would show
"next" instead of "done" depending on the orientation of the device
on tablets.

Change-Id: Id9dece919226f43a9bd5901ec9135267c1321ff4

Author: Jim Miller

core/res/res/layout-sw600dp/keyguard_screen_password_portrait.xml

@@ -98,7 +98,7 @@
                     android:textAppearance="?android:attr/textAppearanceMedium"
                     android:background="@null"
                     android:textColor="#ffffffff"
-                    android:imeOptions="flagForceAscii"
+                    android:imeOptions="flagForceAscii|actionDone"
                 />
 
                 <!-- This delete button is only visible for numeric PIN entry -->