Dynamically load scapy when necessary

Remove the dependency of scapy for tests that don't use it by changing
common utilities to dynamically load the library when needed.

Bug: 247016808
Test: None
Change-Id: I9c272d6b39ce4c1d9bb7f44cea011a56b07b563b
1 file changed
tree: bf72b0fe792e1b2d1bcadac5d4508a1ea5fcc165
  1. acts/
  2. acts_tests/
  3. tools/
  4. wts-acts/
  5. Android.mk
  6. LICENSE
  7. OWNERS
  8. PREUPLOAD.cfg