Remove flaggedApi for APIs in isolated process

Per b/301491148 and b/325678077, isolated process are not allowed to
access flags as the flagging infra uses content provider api. As
suggested from the trunk stable team, we are removing those APIs.

Bug: 325678077 330735044
Test: atest CtsVoiceInteractionTestCases
Flag: EXEMPT Isolated process cannot use FlaggedAPI annotation
Change-Id: I0c790648f5db969c30792d2921ccc580af72b4e2