Revert "Bluetooth: use hdev lock for accept_list and reject_list in conn req"

This reverts commit 8ace1e63 which is
commit fb048cae upstream.

It breaks the Android kernel ABI and is not needed for Android devices,
so it is safe to revert for now.  If it is determined that it is needed
in the future, it can be brought back in an abi-preserving way.

Bug: 161946584
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I6593a06f315b0b5798602895e095e680f8dbd535