i18npool: Ctor feature for com.sun.star.i18n.InputSequenceChecker

Change-Id: I7937b5ba09c00448678e71c1786f775998f0f6fa
more similar handling of InputSequenceChecker as in other places

Change-Id: Ia6efc0eda03dac87c73e720d08f320ce3fc6ce4a