Merge "composer: minor documentation fix" into tm-dev

     * idle period.

     *

     * This function should only be called if the display reports support for

     * DisplayCapability.DISPLAY_IDLE from getDisplayCapabilities.

     * DisplayCapability.DISPLAY_IDLE_TIMER from getDisplayCapabilities.

     *

     * @param display is the display to which the idle timer is set.

     * @param timeoutMs is the minimum requirements of idle period in milliseconds. Panel