android::Surface 如何获取SurfaceControl

要获取到 `android::SurfaceControl`，可以通过以下代码：

#include <gui/Surface.h>
#include <gui/SurfaceControl.h>

sp<IBinder> display = SurfaceComposerClient::getBuiltInDisplay(ISurfaceComposer::eDisplayIdMain);
DisplayInfo dinfo;
SurfaceComposerClient::getDisplayInfo(display, &dinfo);
ssize_t displayWidth = dinfo.w;
ssize_t displayHeight = dinfo.h;

sp<SurfaceControl> surfaceControl = SurfaceComposerClient::getInstance()->createSurface(
        String8("MySurface"),
        displayWidth, displayHeight, PIXEL_FORMAT_RGBA_8888, 0);

sp<Surface> surface = surfaceControl->getSurface();

这里我们调用 `SurfaceComposerClient::getInstance()->createSurface()` 方法创建了一个 `SurfaceControl` 对象，并通过 `getSurface()` 方法获取到了对应的 `Surface` 对象。