Revert "psample: Require 'CAP_NET_ADMIN' when joining "packets" group"

This reverts commit fe840251 which is
commit 44ec98ea5ea9cfecd31a5c4cc124703cb5442832 upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I2be6c74c85241cd9cad52f7e58830e8f7771ace3
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>