Move auto installclean to soong_ui

This way kati doesn't need to keep state for which build got run last,
and we have to run kati less often. This was forcing another kati run
for an empty out directory, and a kati run (or two) every time you
switched products that shared a device.

Bug: 35970961
Test: m clean; m -j blueprint_tools; m -j blueprint_tools; m -j blueprint_tools
Test: lunch aosp_arm-eng; m -j blueprint_tools; lunch full-eng; m -j blueprint_tools; <repeat>
Change-Id: I825a0868fb7059016a940c76244527432e3e7cff