Merge "Use buffered I/O during certificate parsing" into gingerbread

import com.android.internal.util.XmlUtils;

import java.io.BufferedInputStream;

import java.io.File;

import java.io.IOException;

import java.io.InputStream;

        try {

            // We must read the stream for the JarEntry to retrieve

            // its certificates.

            InputStream is = jarFile.getInputStream(je);

            InputStream is = new BufferedInputStream(jarFile.getInputStream(je));

            while (is.read(readBuffer, 0, readBuffer.length) != -1) {

                // not using

            }