am 779a4ca8: Merge "Improve robustness of package manager certificate collection." into froyo

Merge commit '779a4ca84d62a6e4f18a723cfc18c5d035f60fed' into froyo-plus-aosp

* commit '779a4ca84d62a6e4f18a723cfc18c5d035f60fed':
  Improve robustness of package manager certificate collection.