Fix edge-to-edge behavior in BuiltInPrintService

BuiltInPrintService was previously opted out of edge-to-edge layout.
Now that the opt-out flag is being removed and the system settings theme
supports edge-to-edge, re-enable support.

Bug: 401464414
Test: Review more options and add printer pages
Change-Id: I77d6160907e268faf5445232b5a02a4a8e8f4ff6