Always update overlay paths of newly added apps

When a package is updated, its overlays must always be initialized.
A package may be affected by framework overlays or overlays of shared
libraries it uses. The overlay paths must always be initialized in
package manager.

To work around this issue, rebooting the device always initializes
overlay paths for all installed applications.

Bug: 180416025
Bug: 180016597
Test: OverlayManagerTests
Change-Id: I1bf0d460336ee757bb191adaaeec0089911fa182