Stabilize handover controller

This makes the following changes to help stabilize handover tests:
    1. Default handover method to "redirect" for both intra/inter-RAT
      handovers.
    2. Add delay for stabilization after handover is complete.
    3. Add polling for attach before failing.

Bug: 286259668
Test: cellular.AssertHandoverIntra/InterRAT (ChromeOS)
Change-Id: Id6da32cd13d3e45257f3527099ddc993ce3f69db
1 file changed
tree: eb57fcec3a082c0e9403d611df0d522869890a3b
  1. acts/
  2. acts_tests/
  3. tools/
  4. wts-acts/
  5. Android.mk
  6. LICENSE
  7. OWNERS
  8. PREUPLOAD.cfg