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

This reverts commit e879cb69fd46ef551538ed93659c20bd0282898a.
Revert "InCallUI: Disable Back button on Non-intursive InCall Card"

This reverts commit 401ce6d3de896fd021e2cce2f28d11e7526f5ab5.
Revert "InCallUI: fix non intrusive incallui layout"

This reverts commit f08b857a39878b322a2cb7fe41b69066bed1bcdd.
Revert "[3/3] InCallUI: allow disabling non intrusive incall ui"

This reverts commit a59a91a2efd5606a382e65569cb204596d6d2b92.