Contacts/Dialer/InCallUI: Material Dark Theme, (7/7):

Part 1/7: frameworks/base
Part 2/7: Contacts
Part 3/7: ContactsCommon
Part 4/7: Dialer
Part 5/7: InCallUI
Part 6/7: PhoneCommon
Part 7/7: services/Telephony

This also changes the theme of the
Mobile network settings (System settings)
from light to dark