PackageInstaller: code cleanup

Change-Id: I68265965d7adbbbb5d8b66344ca285d29e7448e0
PackageInstaller: enable install quick mode

Change-Id: I53756d857cef3e4c18db8d1a665c6a4089a44221
PackageInstaller: update

Change-Id: I87aebcf97f0db7cbb18fb36947dd47965da9afc2