Fix 6663465: remove flagNoEnterAction in favor of actionNext

This fixes a bug where the return key was showing in some layouts
for choose/confirm password screens in Settings.  Now we just use
"actionNext" which ensures we see consistent behavior across
devices.

Change-Id: I4bf3033654b85f14c55de6f418caaf1ce563c33a

res/layout-sw600dp/choose_lock_password.xml

@@ -46,6 +46,7 @@
         android:singleLine="true"
         android:textStyle="bold"
         android:inputType="textPassword"
+        android:imeOptions="actionNext"
         android:gravity="center"
         android:layout_gravity="center"
         android:textSize="32sp"

res/layout-sw600dp/confirm_lock_password.xml

@@ -49,6 +49,7 @@
         android:singleLine="true"
         android:textStyle="bold"
         android:inputType="textPassword"
+        android:imeOptions="actionNext"
         android:gravity="center"
         android:layout_gravity="center"
         android:textSize="32sp"