Android 显示系统（一）创建Activity的过程中创建Surface

private void handleLaunchActivity(ActivityClientRecord r, Intent customIntent) {
// If we are getting ready to gc after going to the background, well
// we are back active so skip it.
unscheduleGcIdler();
mSomeActivitiesChanged = true;

if (r.profilerInfo != null) {
mProfiler.setProfiler(r.profilerInfo);
mProfiler.startProfiling();
}

/// M: It's for debugging App Launch time
logAppLaunchTime(TAG, "handleLaunchActivity is called");
.....
}