[connectivity_test_utils] Utils methods for socket keepalive tests

CHERRY PICKED CHANGES FROM AOSP

Bug: 123774509
Test: Verified the changes
Change-Id: I582cc33403d636638572ea2d919c5a9a3b5c286f
Merged-In: Ie15c80db415d2af808b55674a1402983933ddaf2
3 files changed
tree: 3f9fae7fc1a6dbea12f185bfebce599e7b0cb6f6
  1. acts/
  2. tools/
  3. wts-acts/
  4. Android.mk
  5. OWNERS
  6. PREUPLOAD.cfg