Add package name extra to PackageInstaller callback

If an app invokes app install via PackageInstaller APIs without knowing
the package name, the callback contains no information about the name
of the installed package. Add EXTRA_PACKAGE_NAME to this callback.

Also allow PackageInstaller to distinguish between a newly installed and
an updated package.

Bug: 19764848
Bug: 20150135
Change-Id: I062440a08df9a723e9445ea10bc6f6800c5b99a8