frameworks/base: support devices with SoftAp that don't require firmware reload

Partial forward port from ICS.
Original Change-Id: If2db6e8ce675c3214ce645231c7a354f41ea0cc6

Change-Id: Iacb2498ec0f567a0a7c4e0dbf9127b70f09223bd
(cherry picked from commit f4dff961f03d7d00b45e6e98c5d97ecb91f3965e)