code: private boolean restoreAccessibilityFocus(CalendarDay day) {
          if (day == null) {
              return false;
          }
  
          final int childCount = getChildCount();
          for (int i = 0; i < childCount; i++) {
              final View child = getChildAt(i);
              if (child instanceof SimpleMonthView) {
                  if (((SimpleMonthView) child).restoreAccessibilityFocus(day)) {
                      return true;
                  }
              }
          }
  
          return false;
      }
docs: Attempts to restore accessibility focus to a given date. No-op if
  {@code day} is {@code null}.
  
  @param day The date that should receive accessibility focus
  @return {@code true} if focus was restored