Always enable bandwidth control in Q

The current bindwith control check the qtaguid module before start. But
since the bandwidth controlling feature is tested by CTS already, all
devices should have either xt_qtaguid or proper eBPF program to support
that by default. So just delete the checking code and always try to turn
it on when device start

Bug: 30950746
Test: The bindwith control start correctly on new devices.
Change-Id: I4cc5ebfbcf89181fcdba3a2711b637722e56ce73