Add S checks around identity decoration set/get API

Add S checks around all set/get identity decoration API to avoid
failing tests in S-on-R.

Bug: 182905625
Test: atest com.android.server.wifi android.net.wifi
Test: atest PasspointConfigurationTest PpsMoParserTest
Change-Id: I3d087860b255a0627161d883502b6f37dd703d18
2 files changed