[automerger skipped] Backport PackageListObserver#onPackageChanged.
am:7b0411782a-s ours am skip reason: change_id Ic48e3c728387ecf02f89d517ba1fe785ab9c75fd with SHA1d8eb8b2690is in history Change-Id: I3697d302e27b111e5ecbce2610183b6562c00ae0
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