only set 'bpf.progs_loaded' property on eBPF capable devices... am: 007c9dd245 am: d16be56e73

Original change: https://googleplex-android-review.googlesource.com/c/platform/system/bpf/+/11859849

Change-Id: I75ae16f3ebc871c33501f60f199bd72998a43eb0
tree: 0732d7bdc74a6d5531dd34f36454eb5ec5a83b6f
  1. bpfloader/
  2. libbpf_android/
  3. progs/
  4. Android.bp
  5. MODULE_LICENSE_APACHE2
  6. NOTICE
  7. OWNERS
  8. PREUPLOAD.cfg