Call finish() when enrollment loses focus

Bug: 134971919

Test: Entering keyguard on any enrollment screen finishes enrollment now
Test: Going back/forward works

Change-Id: I2c80a5586c10fa3feb780a5eadfe203abed52dea

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

@@ -47,6 +47,8 @@ public abstract class BiometricEnrollIntroduction extends BiometricEnrollBase
     private boolean mHasPassword;
     private boolean mBiometricUnlockDisabledByAdmin;
     private TextView mErrorText;
+    protected boolean mConfirmingCredentials;
+    protected boolean mNextClicked;
 
     /**
      * @return true if the biometric is disabled by a device administrator
@@ -149,10 +151,12 @@ public abstract class BiometricEnrollIntroduction extends BiometricEnrollBase
 
         if (!mHasPassword) {
             // No password registered, launch into enrollment wizard.
+            mConfirmingCredentials = true;
             launchChooseLock();
         } else if (mToken == null) {
             // It's possible to have a token but mLaunchedConfirmLock == false, since
             // ChooseLockGeneric can pass us a token.
+            mConfirmingCredentials = true;
             launchConfirmLock(getConfirmLockTitleResId(), getChallenge());
         }
     }
@@ -182,6 +186,7 @@ public abstract class BiometricEnrollIntroduction extends BiometricEnrollBase
 
     @Override
     protected void onNextButtonClick(View view) {
+        mNextClicked = true;
         if (checkMaxEnrolled() == 0) {
             // Lock thingy is already set up, launch directly to the next page
             launchNextEnrollingActivity(mToken);
@@ -249,12 +254,14 @@ 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);
+                mConfirmingCredentials = false;
                 return;
             } else {
                 setResult(resultCode, data);
                 finish();
             }
         } else if (requestCode == CONFIRM_REQUEST) {
+            mConfirmingCredentials = false;
             if (resultCode == RESULT_OK && data != null) {
                 mToken = data.getByteArrayExtra(ChooseLockSettingsHelper.EXTRA_KEY_CHALLENGE_TOKEN);
                 overridePendingTransition(R.anim.sud_slide_next_in, R.anim.sud_slide_next_out);