docs: clarified some LRO types docs: fixed some wrong update mask descriptions#298

Neenu1995 merged 2 commits intomastergoogleapis/java-dialogflow-cx:masterfrom

owl-bot-b5b8d248-bdac-44c7-acc5-3061da96f55bgoogleapis/java-dialogflow-cx:owl-bot-b5b8d248-bdac-44c7-acc5-3061da96f55bCopy head branch name to clipboard