Prepare for refactoring wifi ipserver start/stop
This is a preparing change.
1) In enableWifiIpServing, replace
ensureIpServerStarted(ifname) +
changeInterfaceState(ifname, ipServingMode)
with enableIpServing(TETHERING_WIFI, ifname, ipServingMode).
And checking whether corresponding wifi or p2p feature is
avaialble before enableWifiIpServing. Note: If the wifi or p2p
feature wasn't supported before, it would still call
changeInterfaceState without ipServer created but
changeInterfaceState would be no-op because there is no
corresponding ipServer for changing state.
2) Splitting enableWifiIpServing into enableWifiIpServing and
enableWifiP2pIpServing.
3) No longer guess the interface name after T. WIFI_AP_STATE_CHANGED
intent should always include ifname and it should be tracked by
mTetherStates. If OEM have modification in wifi framework to send
empty ifname, tethering no longer support this after T.
4) After T, tethering always trust the ifname which pass by wifi or p2p
intent broadcast and treat it as TETHERING_WIFI or
TETHERING_WIFI_P2P. This allow tethering to deprecate wifi/p2p regexs
after T.
Bug: 189410000
Bug: 178116595
Bug: 185451791
Bug: 190145323
Bug: 176048959
Test: atest TetheringTests
Change-Id: Ia5f69ddf2d842536ce0df75eeae57866f56df571
2 files changed