[NFC] Add a picture under NFC settings to show NFC detection point.

Each smartphone has a different NFC antenna detection point,
users would confuse where the NFC antenna is and how to place the
smartphone close to the card reader/equipment.

Starting from Android R device, we move NFC antenna position from
top area to middle center of the phone.

From the OEMs perspective, they could implement their own picture
to indicate the best NFC detection point.Hence, we propose to
show NFC antenna position under NFC setting.

Bug: 142230563
Test: build pass
Change-Id: Ib3cd7fc3ea299be1667aba0aeebaa148fb49015f