WifiManager: Add STA + STA use-case API's

The generic STA + STA support API is not very useful since there are a
bunch of STA + STA features and OEM's may selectively enable some
use-cases. Add use-case specific API's for STA + STA support.

Also, remvoved isAtLeastS() on these query API's since they are
harmless to expose on R devices.

Bug: 181272970
Test: atest android.net.wifi
Test: atest com.android.server.wifi
Test: atest android.net.wifi.cts
Change-Id: Ia84d7e4af79f55386bdf02e297109f9f36c0402e
14 files changed