Use updated mock-able libwifi-system interface

While here, replace copy/pasted code with shared functionality.

Bug: 29634806
Change-Id: If1a7b7e8baebdbccb8208bac194d95b4d2649814
2 files changed
tree: 45318063c0346605e230cadc255686d6e7e4debb
  1. sl4n/