[OWE] Rename isOweSupported to isEnhancedOpenSupported

Stick to the official WFA marketing name in this public API.

Bug: 125850601
Test: atest com.android.server.wifi
Test: Use Settings to scan and connect to OWE network
Test: atest WifiConfigControllerTest
Change-Id: I1360658e805b10db65f66f1194e342b063b741a4