title: FirebaseUI needs pending intent
body: <p>I have a code which goes to firebaseAuthUI with this activityResultLauncher:</p>
  <pre><code>        //used for login
      this.loginActivityLauncher = registerForActivityResult(new FirebaseAuthUIActivityResultContract(),
          result -&gt; {
              String s;
              //result success
              if(result.getResultCode() == RESULT_OK) {
                  user.SignIn(MainActivity.this);
                  s = getString(R.string.welcome);
              }
              //user exited login screen
              else if(result.getIdpResponse() == null){
                  s = getString(R.string.error_login_cancelled);
              }
              //error
              else {
                  s = Objects.requireNonNull(result.getIdpResponse().getError()).getLocalizedMessage();
                  Utils.AlertBuild(null, s, null, MainActivity.this).show();
              }
  
              updateData(s);//update screen
      });
  </code></pre>
  <p>But when I try my app with a newer OS the app crashes with this error:</p>
  <pre><code>E/AndroidRuntime: FATAL EXCEPTION: main
      Process: com.example.bigproject, PID: 2013
      java.lang.IllegalArgumentException: com.example.bigproject: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent.
      Strongly consider using FLAG_IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being mutable, e.g. if it needs to be used with inline replies or bubbles.
          at android.app.PendingIntent.checkFlags(PendingIntent.java:401)
          at android.app.PendingIntent.getActivityAsUser(PendingIntent.java:484)
          at android.app.PendingIntent.getActivity(PendingIntent.java:470)
          at android.app.PendingIntent.getActivity(PendingIntent.java:434)
          at com.google.android.gms.internal.auth-api.zzr.zzc(com.google.android.gms:play-services-auth@@19.0.0:19)
          at com.google.android.gms.auth.api.credentials.CredentialsClient.getHintPickerIntent(com.google.android.gms:play-services-auth@@19.0.0:10)
          at com.firebase.ui.auth.ui.phone.CheckPhoneHandler.fetchCredential(CheckPhoneHandler.java:28)
          at com.firebase.ui.auth.ui.phone.CheckPhoneNumberFragment.setDefaultCountryForSpinner(CheckPhoneNumberFragment.java:246)
          at com.firebase.ui.auth.ui.phone.CheckPhoneNumberFragment.onActivityCreated(CheckPhoneNumberFragment.java:130)
          at androidx.fragment.app.Fragment.performActivityCreated(Fragment.java:2996)
          at androidx.fragment.app.FragmentStateManager.activityCreated(FragmentStateManager.java:580)
          at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:285)
          at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:2189)
          at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:2100)
          at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:2002)
          at androidx.fragment.app.FragmentManager.dispatchStateChange(FragmentManager.java:3138)
          at androidx.fragment.app.FragmentManager.dispatchActivityCreated(FragmentManager.java:3072)
          at androidx.fragment.app.FragmentController.dispatchActivityCreated(FragmentController.java:251)
          at androidx.fragment.app.FragmentActivity.onStart(FragmentActivity.java:502)
          at androidx.appcompat.app.AppCompatActivity.onStart(AppCompatActivity.java:246)
          at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1467)
          at android.app.Activity.performStart(Activity.java:7945)
          at android.app.ActivityThread.handleStartActivity(ActivityThread.java:3750)
          at android.app.servertransaction.TransactionExecutor.performLifecycleSequence(TransactionExecutor.java:221)
          at android.app.servertransaction.TransactionExecutor.cycleToPath(TransactionExecutor.java:201)
          at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:173)
          at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97)
          at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2272)
          at android.os.Handler.dispatchMessage(Handler.java:106)
          at android.os.Looper.loopOnce(Looper.java:201)
          at android.os.Looper.loop(Looper.java:288)
          at android.app.ActivityThread.main(ActivityThread.java:7902)
          at java.lang.reflect.Method.invoke(Native Method)
          at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
          at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:933)
  </code></pre>
  <p>I didn't find a way to convert or launch firebaseAuthUI with pending intent and I also make the Intent by this code and I don't know how to change it to PendingIntent:</p>
  <pre><code>    public Intent createIntent() {
          return AuthUI.getInstance()
                  .createSignInIntentBuilder()
                  .setAvailableProviders(Collections.singletonList(new AuthUI.IdpConfig.PhoneBuilder().build()))
                  .setLogo(R.drawable.main_act_img)
                  .build();
      }
  </code></pre>