Ensure category is loaded in individual picker

Reload the category when starting the Individual Picker
Activity and Fragment, since we cannot assume that they're
loaded (these were only loaded in TopLevelActivity before,
and not when the IndividualPickerActivity got restarted from
a config change for example).
If the categories are already loaded, fetching them is a
no-op.

Bug: 136241900
Change-Id: I6cab551d0eef3c714c72983496dd4ff842ad3661
2 files changed