Merge "Update docs to match CDD language" into tm-dev

         * 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>

         *   <li> {@code TONAL_SPOT} is a mid vibrancy palette that uses an accent 3 analogous to

         *   accent 1.</li>

         *   <li> {@code VIBRANT} is a high vibrancy palette that harmoniously blends subtle shifts

         *   between colors.</li>

         *   <li> {@code EXPRESSIVE} is a high vibrancy palette that pairs unexpected and unique

         *   accents colors together.</li>

         *   <li> {@code SPRITZ} is a low vibrancy palette that creates a soft wash between

         *   colors.</li>

         *   <li> {@code RAINBOW} uses both chromatic accents and neutral surfaces to create a more

         *   subtle color experience for users.</li>

         *   <li> {@code FRUIT_SALAD} experiments with the concept of "two tone colors" to give

         *   users more expression.</li>

         * </ul>

         *

         * Example of valid fabricated theme specification: