Fix for crash seen in WifiManager#getUsableChannels()

1. Added the missing framework bands in the method where
framework converts framework band to wifi HAL defenition of
band.
2. Added code to catch the IllegalArgumentException

Bug: 192111061
Bug: 192309370
Test: atest android.net.wifi.cts.WifiManagerTest#testGetAllowedChannels
Test: atest com.android.server.wifi
Change-Id: Ia5bfba05012c3ea61102b1e43cac20cc4f3a558d
4 files changed