Replace the existing notifications on lock screen preferences with new page

Replace the existing notifications on lock screen preferences with the new
notifications on lock screen page entries.

Bug: 367455695
Flag: com.android.server.notification.notification_lock_screen_settings
Test: Manual, Settings - Display & touch - Lockscreen; Settings - Security &
privacy - More security & privacy

Change-Id: I858f84db8b5c09895d6b196426b32b3bfbd80d15