MBB: Captive portal disconnect primary no broadcast

fix a bug causing a WIFI_STATE_DISABLED broadcast to be incorrectly sent
when captive portal is detected on the secondary transient network
during MBB.

Bug: 193369655
Test: atest com.android.server.wifi
Change-Id: I07b1a587130e05f653485dda62d457e1c9976eb2
4 files changed