Detect upstream hotspot device type by checking the vendor specific IE.

Checking a particular IE (vendor specific) in the wifi scan results to
identify upstream hotspot device type, meanwhile also checking if the
ssid matches with the network which the downstream device is attaching to.

Bug: 137835398
Test: atest FrameworksNetTests NetworkStackTests NetworkStackIntegrationTests
Test: 1.attach to upstream hotspot device by selecting the sanned
      ssid from wifi settings, then check the OUI, vendor specific
      type fileds of IEs from the logcat.
      2. build network stack module and install on Q device, verify wifi
      works normally.
Change-Id: I8b0ea9542775aecc13ed8ceede80abd693002825