public static XC_MethodHook.Unhook findAndHookConstructor(Class<?> clazz, Object... parameterTypesAndCallback) {
        if (parameterTypesAndCallback.length == 0 || !(parameterTypesAndCallback[parameterTypesAndCallback.length - 1] instanceof XC_MethodHook))
            throw new IllegalArgumentException("no callback defined");

        XC_MethodHook callback = (XC_MethodHook) parameterTypesAndCallback[parameterTypesAndCallback.length - 1];
        Constructor<?> m = findConstructorExact(clazz, getParameterClasses(clazz.getClassLoader(), parameterTypesAndCallback));

        return XposedBridge.hookMethod(m, callback);
    }
Look up a constructor and hook it. See {@link #findAndHookMethod(String, ClassLoader, String, Object...)}
for details.
android/android_framework/base/src/main/java/util/XposedHelpers.java