Clean up choose lock intent creation

Consolidated the many variants of ChooseLock*.createIntent, so that
it will take the same set of arguments.

Also modified SetupChooseLock*.createIntent to modifyIntentForSetup,
which will take the intent created by ChooseLock* and modify it for
use with setup.

Test: cd tests/robotests && mma
Change-Id: I5ff033f459c33ec9980872a536b3996d89f2bbbb

src/com/android/settings/EncryptionInterstitial.java

@@ -36,6 +36,7 @@ import android.widget.TextView;
 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
 import com.android.settings.core.InstrumentedFragment;
 import com.android.settings.core.instrumentation.InstrumentedDialogFragment;
+import com.android.settings.password.ChooseLockSettingsHelper;
 import com.android.setupwizardlib.GlifLayout;
 
 import java.util.List;