Launch settings for clicking fingerprint unlock

Launch FingerprintSettings directly when user clicks "Fingerprint
Unlock". Let Fingerprint settings peform confirmLock() or chooseLock().
And to have smoothly animation, instead of generating challenge in
FingerprintSettings::onActivityResult(), challenge is generated in next
visible activity, and pass it back through next activity result.

Bug: 197717071
Test: atest GatekeeperPasswordProviderTest CredentialModelTest
Test: atest AutoCredentialViewModelTest FingerprintStatusUtilsTest
Test: RunSettingsRoboTests2 FingerprintEnrollIntroductionTest
Test: Manually test fingerprint enroll in settings or suw
Change-Id: Ie27c3c493ea475f6b53cb6bb3f2d45d555f47cb3

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

@@ -31,6 +31,7 @@ import android.widget.TextView;
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.StringRes;
+import androidx.annotation.VisibleForTesting;
 
 import com.android.internal.widget.LockPatternUtils;
 import com.android.settings.R;
@@ -58,6 +59,7 @@ public abstract class BiometricEnrollIntroduction extends BiometricEnrollBase
     private static final String KEY_CONFIRMING_CREDENTIALS = "confirming_credentials";
     private static final String KEY_SCROLLED_TO_BOTTOM = "scrolled";
 
+    private GatekeeperPasswordProvider mGatekeeperPasswordProvider;
     private UserManager mUserManager;
     private boolean mHasPassword;
     private boolean mBiometricUnlockDisabledByAdmin;
@@ -178,7 +180,7 @@ public abstract class BiometricEnrollIntroduction extends BiometricEnrollBase
 
         mErrorText = getErrorTextView();
 
-        mUserManager = UserManager.get(this);
+        mUserManager = getUserManager();
         updatePasswordQuality();
 
         if (!mConfirmingCredentials) {
@@ -253,8 +255,28 @@ public abstract class BiometricEnrollIntroduction extends BiometricEnrollBase
         return super.shouldFinishWhenBackgrounded() && !mConfirmingCredentials && !mNextClicked;
     }
 
+    @VisibleForTesting
+    @NonNull
+    protected GatekeeperPasswordProvider getGatekeeperPasswordProvider() {
+        if (mGatekeeperPasswordProvider == null) {
+            mGatekeeperPasswordProvider = new GatekeeperPasswordProvider(getLockPatternUtils());
+        }
+        return mGatekeeperPasswordProvider;
+    }
+
+    @VisibleForTesting
+    protected UserManager getUserManager() {
+        return UserManager.get(this);
+    }
+
+    @VisibleForTesting
+    @NonNull
+    protected LockPatternUtils getLockPatternUtils() {
+        return new LockPatternUtils(this);
+    }
+
     private void updatePasswordQuality() {
-        final int passwordQuality = new LockPatternUtils(this)
+        final int passwordQuality = getLockPatternUtils()
                 .getActivePasswordQuality(mUserManager.getCredentialOwnerProfile(mUserId));
         mHasPassword = passwordQuality != DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED;
     }
@@ -301,6 +323,14 @@ public abstract class BiometricEnrollIntroduction extends BiometricEnrollBase
         startActivityForResult(intent, BIOMETRIC_FIND_SENSOR_REQUEST);
     }
 
+    /**
+     * Returns the intent extra data for setResult(), null means nothing need to been sent back
+     */
+    @Nullable
+    protected Intent getSetResultIntentExtra(@Nullable Intent activityResultIntent) {
+        return activityResultIntent;
+    }
+
     @Override
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
         Log.d(TAG,
@@ -310,7 +340,7 @@ public abstract class BiometricEnrollIntroduction extends BiometricEnrollBase
                 && BiometricUtils.isMultiBiometricFingerprintEnrollmentFlow(this);
         if (requestCode == BIOMETRIC_FIND_SENSOR_REQUEST) {
             if (isResultFinished(resultCode)) {
-                handleBiometricResultSkipOrFinished(resultCode, data);
+                handleBiometricResultSkipOrFinished(resultCode, getSetResultIntentExtra(data));
             } else if (isResultSkipped(resultCode)) {
                 if (!BiometricUtils.tryStartingNextBiometricEnroll(this,
                         ENROLL_NEXT_BIOMETRIC_REQUEST, "BIOMETRIC_FIND_SENSOR_SKIPPED")) {