remove BpfLevel and getBpfSupportLevel in favour of isAtLeastKernelVersion am: dcb5228f2c am: 9da4968f92

Original change: https://android-review.googlesource.com/c/platform/system/bpf/+/1552952

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I99391327ff182d45815600a382c015a9f6f2a043
tree: 71a26bb3e81931899eb12a0273983ea643a316fb
  1. bpfloader/
  2. libbpf_android/
  3. progs/
  4. Android.bp
  5. NOTICE
  6. OWNERS
  7. PREUPLOAD.cfg