Fire pending intent from Confirm Credentials flow

Add support in the Confirm Credentials flow to read an Intent extra
and fire it when authentication succeeds.

This is part of the Separate Work Challenge feature.

Change-Id: I52c203735fa9b53fd2f7df971824747eeb930f36

src/com/android/settings/ConfirmLockPassword.java

@@ -20,6 +20,7 @@ import android.app.Fragment;
 import android.app.admin.DevicePolicyManager;
 import android.content.Context;
 import android.content.Intent;
+import android.content.IntentSender;
 import android.os.AsyncTask;
 import android.os.Bundle;
 import android.os.CountDownTimer;
@@ -405,6 +406,7 @@ public class ConfirmLockPassword extends ConfirmDeviceCredentialBaseActivity {
             mPasswordEntryInputDisabler.setInputEnabled(true);
             if (matched) {
                 startDisappearAnimation(intent);
+                checkForPendingIntent();
             } else {
                 if (timeoutMs > 0) {
                     long deadline = mLockPatternUtils.setLockoutAttemptDeadline(