Hide Wi-Fi activity indicator when Wi-Fi icon is hidden

Wi-Fi icon in the status bar can be blocked by System UI Tuner.
So the activity indicator should be hidden.

Fixes: 62211154
Test: manual - block Wi-Fi icon

Author: Akira Oshimi <akira.oshimi@sony.com>
Change-Id: Iba698d621d60f6d6c9f6d8205f91df49806f3f54