[LockSetup] Add padding to lock setup screens

Add SuwContentFrame to the style of the lock screen setup screens so
that paddings are applied.

Bug: 19612353
Change-Id: I8ca42b23f03c48b670fce0966ea537ddf8919b7b

res/layout/setup_choose_lock_password.xml

@@ -26,6 +26,7 @@
     settings:suwIllustrationImage="@drawable/setup_illustration_lock_screen">
 
     <LinearLayout
+        style="@style/SuwContentFrame"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:gravity="center_horizontal"

res/layout/setup_choose_lock_pattern.xml

@@ -27,6 +27,7 @@
 
     <com.android.internal.widget.LinearLayoutWithDefaultTouchRecepient
         android:id="@+id/topLayout"
+        style="@style/SuwContentFrame"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:orientation="vertical">