Merge "Rename PacManager to PacProxyInstaller" am: 3b26172c84 am: 3fb8d62ea1

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1513130

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Iad81d2612d16585134028fea71cbab2f1fb13610