Reset progress bar when restarting file commit

package com.android.packageinstaller;

import static android.content.pm.PackageInstaller.SessionParams.UID_UNKNOWN;

import android.annotation.Nullable;

import android.app.Activity;

import android.app.PendingIntent;

import android.util.Log;

import android.widget.Button;

import android.widget.ProgressBar;

import com.android.internal.content.PackageHelper;

import java.io.File;

import java.io.InputStream;

import java.io.OutputStream;

import static android.content.pm.PackageInstaller.SessionParams.UID_UNKNOWN;

/**

 * Send package to the package manager and handle results from package manager. Once the

 * installation succeeds, start {@link InstallSuccess} or {@link InstallFailed}.

                return null;

            }

            session.setStagingProgress(0);

            try {

                File file = new File(mPackageURI.getPath());