Merge "vibrator extension: use checked_interface_cast"

#include <binder/IServiceManager.h>

#include <gtest/gtest.h>

using android::checked_interface_cast;

using android::IBinder;

using android::IInterface;

using android::interface_cast;

using android::OK;

using android::sp;

using android::waitForVintfService;

    // getting the extension

    sp<IBinder> ext;

    ASSERT_EQ(OK, IInterface::asBinder(vib)->getExtension(&ext));

    sp<ICustomVibrator> cvib = interface_cast<ICustomVibrator>(ext);

    sp<ICustomVibrator> cvib = checked_interface_cast<ICustomVibrator>(ext);

    ASSERT_NE(nullptr, cvib.get());

    // calling extension method