Fix test failed due to scan failure

For test_stress_network_selector_2G_connection, change to
use another safer util function to trigger scan.

Bug: 119210794
Test: Local
Change-Id: Ib7fe997f96f673b0ed80c1fce6fbf8d2f359829a
(cherry picked from commit 46f99f4e869f0160fc2d1e8dd66eea71da48f600)
1 file changed
tree: 7c97689312149c441cfd35b365b0df0fb3d145d6
  1. acts/
  2. tools/
  3. wts-acts/
  4. Android.mk
  5. PREUPLOAD.cfg