Revert "InCallUI: add Incoming Call Background (Intrusive InCall improvement) (1/2)"

This reverts commit e04112ca45a0054f9de7c0902b8ee44761ce4dfb.
Revert "Bring back non intrusive UI"

This reverts commit 553438389435f6cefbf461be74eac2325a7f0ead.