[DPP] Rename isDppSupported to isEasyConnectSupported

Rename isDppSupported to isEasyConnectSupported to be
consistent with the rest of the API.

Bug: 123041766
Test: atest com.google.android.gts.setupwizard.DppHostTest
Test: act.py -c ../WifiDppConfig.json -tc WifiDppTest
Change-Id: I45fe54140c593b33b43fb67128c5e540859cc3ff
2 files changed