ANDROID: Revert "ANDROID: sched: Disallow WALT with CFS bandwidth control"

This reverts commit d342ee64.

The WALT code is updated to handle the CFS tasks throttling and
unthrottling. So remove the limitation of disabling WALT to
enable CFS_BANDWIDTH feature.

Bug: 139071966
Change-Id: I3b3a17cd3e552b6238cfba24c9251b7b83e2bda3
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Todd Kjos <tkjos@google.com>