Add more testcases into wifi_power_connectivity

Add WiFi power scan test, WiFi power roaming test, and WiFi power DTIM
test. Each test script would contain all needed sub testcases. Move
pass_fail_check funciton into utilities file. Add constants in
wifi_constants.py

Test: Done
Bug: None

Change-Id: I73a210d6354f07c4d5ea07a1d4fdab760de34fda
Signed-off-by: Qi Jiang <qijiang@google.com>
5 files changed
tree: 1b163dfd0bd6f1051b34506872770b4058b6781f
  1. acts/
  2. tools/
  3. Android.mk
  4. PREUPLOAD.cfg