Merge "Move Proxy, PacProxySelector out of Connectivity" am: 14bcef6a65 am: b7f911ad07

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1598157

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I4cc62d59b1da5053a4af976e30d411d8f066bbcc