Merge "Reduce footprint of Signature from ~7000 to ~1448" into gingerbread

import android.os.Parcel;

import android.os.Parcelable;

import java.lang.ref.SoftReference;

import java.util.Arrays;

/**

    private final byte[] mSignature;

    private int mHashCode;

    private boolean mHaveHashCode;

    private String mString;

    private SoftReference<String> mStringRef;

    /**

     * Create Signature from an existing raw byte array.

     * cached so future calls will return the same String.

     */

    public String toCharsString() {

        if (mString != null) return mString;

        String str = new String(toChars());

        mString = str;

        return mString;

        String str = mStringRef == null ? null : mStringRef.get();

        if (str != null) {

            return str;

        }

        str = new String(toChars());

        mStringRef = new SoftReference<String>(str);

        return str;

    }

    /**