Fix regression of View visibleChanges times

onVisibilityAggregated slow down is due to Autofill code directly
request a feature flag from Device config, which is slow and not cached.
This change caches that value.

Bug: 265356545
Test: atest android.view.contentcapture.LoginTest
Change-Id: Icccf4831b2168e4dcad79475ac2a06162e7910cb