simplify: BpfLevel -> BpfEnabled where appropriate

bpf::BpfLevel getBpfLevel() --> bool getBpfEnabled()
bpf::BpfLevel mBpfLevel --> bool mBpfEnabled

Test: build, atest
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: Idb5f9ed10e123a5653047b9d31c7245b9cb8a46e
4 files changed