Merge "Make the back longpress timeout a system property" into qt-r1-dev

import android.os.Looper;

import android.os.RemoteException;

import android.os.SystemClock;

import android.os.SystemProperties;

import android.util.Log;

import android.util.MathUtils;

import android.view.Gravity;

public class EdgeBackGestureHandler implements DisplayListener {

    private static final String TAG = "EdgeBackGestureHandler";

    private static final int MAX_LONG_PRESS_TIMEOUT = 250;

    private static final int MAX_LONG_PRESS_TIMEOUT = SystemProperties.getInt(

            "gestures.back_timeout", 250);

    private final IPinnedStackListener.Stub mImeChangedListener = new IPinnedStackListener.Stub() {

        @Override