Merge "Customization settings documentation"

         * category, formatted as a serialized {@link org.json.JSONObject}. If there is no

         * corresponding package included for a category, then all overlay packages in that

         * category must be disabled.

         *

         * A few category keys have special meaning and are used for Material You theming.

         *

         * A {@code FabricatedOverlay} containing Material You tonal palettes will be generated

         * in case {@code android.theme.customization.system_palette} contains a

         * {@link android.annotation.ColorInt}.

         *

         * The strategy used for generating the tonal palettes can be defined with the

         * {@code android.theme.customization.theme_style} key, with one of the following options:

         * <ul>

         *   <li> TONAL_SPOT = Default Material You theme since Android S.</li>

         *   <li> VIBRANT = Theme where accent 2 and 3 are analogous to accent 1.</li>

         *   <li> EXPRESSIVE = Highly chromatic theme.</li>

         *   <li> SPRITZ = Desaturated theme, almost greyscale.</li>

         * </ul>

         *

         * Example of valid fabricated theme specification:

         * <pre>

         * {

         *     "android.theme.customization.system_palette":"B1611C",

         *     "android.theme.customization.theme_style":"EXPRESSIVE"

         * }

         * </pre>

         * @hide

         */

        @SystemApi