feat(mobile): Add people list to exit bottom sheet (#6717)

* feat(mobile): Define constants as 'const'

* feat(mobile): Add people list to asset bottom sheet

Add a list of people per asset in the exif bottom sheet, like on the
web.

Currently the list of people is loaded by making a request each time to
the server. This is the MVP approach.
In the future, the people information can be synced like we're doing
with the assets.

* styling

---------

Co-authored-by: Alex Tran <alex.tran1502@gmail.com>

mobile/lib/modules/search/ui/curated_people_row.dart

@@ -44,10 +44,6 @@ class CuratedPeopleRow extends StatelessWidget {
 
     return ListView.builder(
       scrollDirection: Axis.horizontal,
-      padding: const EdgeInsets.only(
-        left: 16,
-        top: 8,
-      ),
       itemBuilder: (context, index) {
         final person = content[index];
         final headers = {