services: Fix tethering (softap) startup.

The interface must be started after firmware reload. If it's not
started, the driver is unable to configure it.

Thanks to Emerson Pinter <dev@pinter.com.br> for the jb version of this.

Change-Id: If8819d463d8c3820e2e159cd365f8ba4af8c0064

Conflicts:
	core/res/res/values/config.xml

Conflicts:
	core/res/res/values/symbols.xml
	services/java/com/android/server/NetworkManagementService.java