Remove WifiManager.isDualModeSupported()

Remove isDualModeSupported, replace callers
with isStaApConcurrencySupported.

Bug: 144925765
Test: atest FrameworksWifiApiTests
Test: boots up and connects to Wifi
Change-Id: I2ed7c483599a1f919cf8a14c22659cf957b67cad
5 files changed