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

This reverts commit ac38a8b3 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: I3d4b14b952996ab0bb272e20e4ec6e32cdaf9688
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>