Don't bring down LOHS when disabling Tethering.

This change makes WifiService able to specify which kind of AP to stop
(tethered, local-only or both).

Bug: 36120314
Test: KitchenSink (enable LOHS and tethering, then disable tethering)
Test: atest FrameworksWifiTests
Change-Id: Ibca2ae2a9c633a07d113090e60bf7396f7edbf40
7 files changed