Amend icon size for delete work profile dialog

Changes are referenced from
https://cs.corp.google.com/android/packages/apps/ManagedProvisioning/res/layout/device_manager_icon_label.xml

Fixed screenshot:
https://screenshot.googleplex.com/01qOjUp0rp8

Bug:27636781

Change-Id: Ib6cf303caa388a8b0d2b7664fd9828a8d2f67098