Fix null pointer exception in onSuccessConfigReceived

DPP session in framework will be null when DPP test
is run via wpa_supplicant cli commands. Framework will
still receive the events from supplicant HAL. Drop the
onSuccessConfigReceived event when DPP session is not
in progress.

Bug: 275277004
Test: atest com.android.server.wifi
Change-Id: Ic72404d8549f58b8ebaf9ae8e768d8f46a14d1f7
1 file changed