[Wi-Fi] Settings panel WIFI_ADD_NETWORKS requires CHANGE_WIFI_STATE permission

Since we had dialog to get the approval from user about adding or updating networks, don't need to have permission to limit suggester APP.

Bug: 148491787
Test: NA, just remove the permission check in Androidmanifest.
Change-Id: If9023e5c2d69b6393f04e16285ac60017b9bf519