Merge "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: b/65563975

Change-Id: Id9673855a805d7391a43a14c4b34ddbb7ba86a4a
(cherry picked from commit 96a86e7adc21f3a2000ddc12fe258211e779accb)
5 files changed
tree: b58764bb655e9874cdcf57ca34df621b55746d74
  1. acts/
  2. tools/
  3. Android.mk
  4. PREUPLOAD.cfg