Finish biometric enroll screens when backgrounded

Currently, there are some biometric security setting and enrollment
screens which remain open after the user has backgrounded them. This
means that they can later be resumed without requiring the user to
confirm their device credential as normal.

This commit fixes the issue in AOSP by adding logic to the affected
biometric enrollment/setting activities in to finish() with
RESULT_TIMEOUT in onStop(). We don't want to finish() these activities
prematurely if the user is currently in a wizard setup flow, however. In
that case, this commit ensures that the newly added logic will not run.

Test: Pixel 3 - Background at each step of fingerprint enroll => finish
Test: Pixel 3 - Rotate at each step of fingerprint enroll => no finish
Test: Pixel 3 - Proceed though fingerprint setup wizard => no change

Bug: 142544519
Change-Id: I8ec0fa1e30bafe097d9dc82991ff786ebf24844b

1 files changed, 0 insertions, 10 deletions

diff --git a/src/com/android/settings/biometrics/face/FaceEnrollIntroduction.java b/src/com/android/settings/biometrics/face/FaceEnrollIntroduction.java
index 073c7e65e3..6709a6ab81 100644
--- a/src/com/android/settings/biometrics/face/FaceEnrollIntroduction.java
+++ b/src/com/android/settings/biometrics/face/FaceEnrollIntroduction.java
@@ -100,16 +100,6 @@ public class FaceEnrollIntroduction extends BiometricEnrollIntroduction {
     }
 
     @Override
-    protected void onStop() {
-        super.onStop();
-
-        if (!isChangingConfigurations() && !mConfirmingCredentials && !mNextClicked
-                && !WizardManagerHelper.isAnySetupWizard(getIntent())) {
-            finish();
-        }
-    }
-
-    @Override
     protected boolean isDisabledByAdmin() {
         return RestrictedLockUtilsInternal.checkIfKeyguardFeaturesDisabled(
                 this, DevicePolicyManager.KEYGUARD_DISABLE_FACE, mUserId) != null;