public CarExtender setColor(@ColorInt int color) {
            mColor = color;
            return this;
        }
Sets the accent color to use when Android Auto presents the notification.
<p>
Android Auto uses the color set with {@link NotificationCompat.Builder#setColor(int)}}
to accent the displayed notification. However, not all colors are acceptable in an
automotive setting. This method can be used to override the color provided in the
notification in such a situation.
android/android_framework/base/src/main/java/github/tornaco/android/thanos/core/compat/NotificationCompat.java