Moving data sanitization before bind

Data sanitization changes the launcher model data, which makes it
out of sync with what Launcher is displaying.
This would lead to widgetsIds getting deleted when they are created
by Launcher on UI thread, but have not yet been updated in the model
Also clearing all ghost widgets on every load. This would remove
the flaky behavior where widget update depends on folder and
other icons getting removed

Test: Presubmit
Bug: 181680555
Change-Id: I3cce69383d9d92a283c5197c3f99fbb539d93dbb