Apply overlay updates to widget provider info

When Runtime Resource Overlays (RROs) are applied to an application,
the ApplicationInfo of the app in package manager is updated to have
overlay paths. Widgets create the context used to inflate their
remote views using a snapshot of the ApplicationInfo of the widget
provider. This snapshot is taken when the widget RemoteView is
initially created and sent to system server.

This change updates the snapshot of the widget provider ApplicationInfo
with the new overlay paths and notifies apps hosting widgets to
re-inflate their remote views in order to have RROs apply to widgets
correctly.

Bug: 193866093
Test: Repeatedly change wallpaper & style color to a "basic" color
      and go back to launcher to observe overlay correct color is
      applied
Change-Id: I0b9b8c0d32d83a52e9ea5bc8ba1635cf99e4b921