Disallow starting activities without new task from non-activity context.

A change to the conditions to allow such behavior when a task id was
specified now allows for all non-activity contexts to start activities
as long as no options bundle is specified.

This changelist corrects the condition.

Change-Id: Ifaff4fc6d875ba74ec532b3e3ce91c6aa3ca3362
Fixes: 32625589
Test: atest CtsActivityManagerDeviceTestCases:StartActivityTests