d2: enable Camera2 overlays

Change-Id: I759561038366160047e32015472cd3c5c0c6d5a4
Revert "remove camera wrapper"

Change-Id: I0960882b622912ca05fb6d3d686be58078310657
Add Camera2 overlay to Use the default resolution of the device as preview size

Change-Id: Id4ad32e75eec43366f7c86ceca562b2742ab9796