Invalidate PackageInfo cache when overlays change

When overlays for a target package change, invalidate PackageInfo
caches across all processes. Overlay paths are not persisted in PMS's
settings, so no need to commit to package settings.

Bug: 156743293
Test: presubmit
Change-Id: I193544abe29cff07dda76a75376961d0d51d9c95
2 files changed