Tweaks to integrate BiometricEnrollActivity to SUW

- Default backup screen lock type to PIN when in SUW
- Propagate the result codes in BiometricEnrollIntroduction, so that
  when the user hits back, SUW will get RESULT_CANCELED
- Follow-up change that was missed in ag/6664364 to not start activity
  when neither fingerprint nor face is available

Test: Manual
Bug: 120797018
Change-Id: I6d4f662928451fb86f301ddb5c6586622c7e6cf7

src/com/android/settings/biometrics/BiometricEnrollActivity.java

@@ -41,19 +41,19 @@ public class BiometricEnrollActivity extends InstrumentedActivity {
         super.onCreate(savedInstanceState);
 
         final PackageManager pm = getApplicationContext().getPackageManager();
-        Intent intent;
+        Intent intent = null;
 
         // This logic may have to be modified on devices with multiple biometrics.
         if (pm.hasSystemFeature(PackageManager.FEATURE_FINGERPRINT)) {
             intent = getFingerprintEnrollIntent();
         } else if (pm.hasSystemFeature(PackageManager.FEATURE_FACE)) {
             intent = getFaceEnrollIntent();
-        } else {
-            intent = new Intent();
         }
 
-        intent.setFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT);
+        if (intent != null) {
-        startActivity(intent);
+            intent.setFlags(Intent.FLAG_ACTIVITY_FORWARD_RESULT);
+            startActivity(intent);
+        }
         finish();
     }
 

src/com/android/settings/biometrics/BiometricEnrollIntroduction.java

@@ -21,11 +21,14 @@ import android.content.Intent;
 import android.os.Bundle;
 import android.os.UserHandle;
 import android.os.UserManager;
+import android.os.storage.StorageManager;
 import android.view.View;
 import android.widget.TextView;
 
+import com.android.internal.widget.LockPatternUtils;
 import com.android.settings.R;
 import com.android.settings.password.ChooseLockGeneric;
+import com.android.settings.password.ChooseLockGeneric.ChooseLockGenericFragment;
 import com.android.settings.password.ChooseLockSettingsHelper;
 import com.android.settings.password.SetupChooseLockGeneric;
 
@@ -202,7 +205,14 @@ public abstract class BiometricEnrollIntroduction extends BiometricEnrollBase
 
     protected Intent getChooseLockIntent() {
         if (WizardManagerHelper.isAnySetupWizard(getIntent())) {
+            // Default to PIN lock in setup wizard
             Intent intent = new Intent(this, SetupChooseLockGeneric.class);
+            if (StorageManager.isFileEncryptedNativeOrEmulated()) {
+                intent.putExtra(
+                        LockPatternUtils.PASSWORD_TYPE_KEY,
+                        DevicePolicyManager.PASSWORD_QUALITY_NUMERIC);
+                intent.putExtra(ChooseLockGenericFragment.EXTRA_SHOW_OPTIONS_BUTTON, true);
+            }
             WizardManagerHelper.copyWizardManagerExtras(getIntent(), intent);
             return intent;
         } else {
@@ -212,23 +222,21 @@ public abstract class BiometricEnrollIntroduction extends BiometricEnrollBase
 
     @Override
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
-        final boolean isResultFinished = resultCode == RESULT_FINISHED;
-        final int result = isResultFinished ? RESULT_OK : RESULT_SKIP;
         if (requestCode == BIOMETRIC_FIND_SENSOR_REQUEST) {
-            if (isResultFinished || resultCode == RESULT_SKIP) {
+            if (resultCode == RESULT_FINISHED || resultCode == RESULT_SKIP) {
-                setResult(result, data);
+                setResult(resultCode, data);
                 finish();
                 return;
             }
         } else if (requestCode == CHOOSE_LOCK_GENERIC_REQUEST) {
-            if (isResultFinished) {
+            if (resultCode == RESULT_FINISHED) {
                 updatePasswordQuality();
                 mToken = data.getByteArrayExtra(
                         ChooseLockSettingsHelper.EXTRA_KEY_CHALLENGE_TOKEN);
                 overridePendingTransition(R.anim.sud_slide_next_in, R.anim.sud_slide_next_out);
                 return;
             } else {
-                setResult(result, data);
+                setResult(resultCode, data);
                 finish();
             }
         } else if (requestCode == CONFIRM_REQUEST) {
@@ -236,7 +244,7 @@ public abstract class BiometricEnrollIntroduction extends BiometricEnrollBase
                 mToken = data.getByteArrayExtra(ChooseLockSettingsHelper.EXTRA_KEY_CHALLENGE_TOKEN);
                 overridePendingTransition(R.anim.sud_slide_next_in, R.anim.sud_slide_next_out);
             } else {
-                setResult(result, data);
+                setResult(resultCode, data);
                 finish();
             }
         } else if (requestCode == LEARN_MORE_REQUEST) {