InstallManagerService and DownloaderService both use the download URL as
the unique ID to represent a given APK install through the whole lifecycle
of the install and download process. This converts the installer stuff to
use the same semantics. A Uri instance is mostly used there because its
the most useful format, but ultimately, the String, Uri, and int all derive
from the exact same URL. This then removes the local APK URI from use in
the installer broadcasts.
While I normally think reusing terms from Android is the best thing to do,
"originating URI" drives me nuts because it is almost nonsense English.
"Originating" is a verb in the continuous form, meaning that it is an
action that is ongoing. A URI is a static thing, and in this case, a URI
that points to a file that is completely downloaded. I left the term in
place for DefaultInstaller because it wraps PackageManager, which is where
that term originates.
This handles "Use strings instead of Uris in InstallManagerService for
urlString" as listed in #680
9d2fe4000d