Merge "Rename PacManager to PacProxyInstaller" am: 3b26172c84 am: 3fb8d62ea1 am: ce85d34306

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I10ff3bab210dbfeb10a19ea99459038499ce5ed9