Move android.settings.WIFI_SETTINGS action to Internet Settings

- Starting from S, the WiFi Settings is changed to Internet Settings

- Redirect to WiFi Settings if Provider Model disabled

- Don't use FLAG_ACTIVITY_NEW_TASK to avoid Lock Task Mode impacted

Bug: 199364761
Bug: 198740257
Bug: 203191404
Test: manual verified by TestDPC apk (see b/198740257#comment41)
Change-Id: I3c283ef58b37f4d3fe27045f431932a35af55023