Merge "Add a system prop to control shader cache priming"

    // set initial conditions (e.g. unblank default device)

    initializeDisplays();

    char primeShaderCache[PROPERTY_VALUE_MAX];

    property_get("service.sf.prime_shader_cache", primeShaderCache, "1");

    if (atoi(primeShaderCache)) {

        getRenderEngine().primeCache();

    }

    // Inform native graphics APIs whether the present timestamp is supported: