Add Wi-Fi HAL facade to sl4n testing.

Initial framework for Wi-Fi HAL testing. Includes a trivial first test
(to obtain the supported features) to test the framework.

Bug: 26564074
Change-Id: I7a553f7a30dc44cdb6a3774076cc1e2405a970a5
5 files changed
tree: 20eb4f0697e48b27cdc7a0488dec95d4b5d17d3d
  1. sl4a/
  2. sl4n/