Integrate input routing for virtio-input

Currently input virtio-input is routed to the most recent display. In
cases when Android is used with more than 1 display, touch will not work
correctly on the most recent display. Associate virtio0/input0 with
display 0 to prevent this issue.

Bug: 148394016
Test: boot
Change-Id: I0f2c595352dc7a3de6b4f5d85babc63c4f5e8f7f