ACTS(wifi): Use shell command for setting country code

WifiManager.setCountryCode() is being removed, use the shell command to
set country code instead from ACTS tests.

Bug: 141107015
Test: Verified the changes
Change-Id: I23ebe57fcb8bed71b6b85ec1697e80bf150044f2
Merged-In: I23ebe57fcb8bed71b6b85ec1697e80bf150044f2
(cherry picked from commit 48df08cf90347b2419987942dd2f26bcd903585e)
22 files changed
tree: f7b74b3a45162d8a5a36b57c3df272fc45565977
  1. acts/
  2. tools/
  3. wts-acts/
  4. Android.mk
  5. OWNERS
  6. PREUPLOAD.cfg