Create helper class to run code on main Wifi thread

Created helper methods to abstract away the mechanism for
running code on the main Wifi thread so that it can be easily
changed globally.

Bug: 138403307
Test: ./tests/wifitests/runtests.sh
Change-Id: I7eeda72e734be2afa44ef7d7cd5cd48495835922
4 files changed
tree: 0925e265e77357600b66f618ac3f3199518e203e
  1. service/
  2. PREUPLOAD.cfg