Handle insets (status bar, navigation bar, etc) properly in adb

backup/restore confirmation dialog.

This flow is deprecated / a developer tool, so we arent investing in
making it look any nicer, but this way, we wont break our CTS tests!
(b/333130113)

After removing opt-out:  http://screen/McdceDpYCHczgRk  http://screen/37Zi4N3FvL9n7s4
With fix:  http://screen/3qhjsdKyi5KuKzq  http://screen/9ZjJJrP5KzjMGSp

Test: manual + https://android-build.corp.google.com/builds/abtd/run/L46300030007841260
Fix: 378652636
Flag: EXEMPT bugfix
Change-Id: I34944e937c10b5cd2536d3f15220cda381c73e6c