PrintSpooler edge to edge support

PrintContentView now fits system windows. Handle the insets in
PrintContentView to accomodate the padding introduced by this.

Reverts ag/26955039 and ag/27354397.

Bug: 378652618
Test: Manual verification that all the elements are visible,
interactable and in the expected position
Flag: com.android.printspooler.flags.print_edge2edge

Change-Id: Ib6c533fedbbc45e0340a389fba71f81be17fedf4