WifiDiagnostics: move to WifiLog API

As part of the log improvement effort, make
WifiDiagnostics the first user of the new WifiLog
API.

In this first step, the new API provides one
small benefit: eliminating the need to pass a
tag in to every log call.

More significant benefits will follow.

BUG=30564894
TEST=wifitests/runtests.sh

Change-Id: I9e32eff07c57bcdd30da2aa7295a59ddd96b6e2d
1 file changed
tree: d62f3ee7ac432d4f9a9b3e6b977d6605afe0f19b
  1. libwifi_hal/
  2. libwifi_system/
  3. service/
  4. tests/