Change AOSP Contacts icon and remove Google logo from launch screen

* replaced all icons in Contacts/res/...
* replaced all icon assets for launch screen in Contacts/res/...
* removed all Google logo assets and dimens for launch screen in Contacts/res/...

I will add the removed stuff for icon, adaptive icon, launch screen back
in k-dev, so that GoogleContacts remains the same.

Bug: 63887147
Test: mmma -j20 packages/apps/Contacts
Manually tested on Nexus5x N, Pixel O, Nexus9 L
https://screenshot.googleplex.com/mGMJs48OC4J

Change-Id: Idf9f31851d8000c777ee67ceab4bbf93c40cd373