Revert "phone: Add option for setting device phone number (squashed)"

This reverts commit 4234c567848f702a00c4bc4eb9dc23829c234f1d.
Revert "the incoming-call screen is displayed when phone is locked while receiving incoming call."

This reverts commit ea7ef9ad300e7bfae9f9a9a1963627762f027e1d.
Revert "Phone: Disable accelerometer sensor while in-call and screen UI is off"

This reverts commit a8fe85ad9838dc42783cf9b08d945cd50d68b952.