Merge "Revert "[VCN06] Support request background network"" am: b380466d29 am: 932ab25ed6 am: 707465a26a

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1553864

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I896c2008e29163527b03f031623e1c70d16e1da4