Contacts/Dialer/InCallUI: Dark theme, (2/7):

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

Unfortunately atm I have no idea how to overwrite
the ringtone picker accent color, so the accent color
is still material_deep_teal_500 (ff009688) instead of light_blue_700 (ff0288d1).