fix: [ANDROAPP-6535] add default relationship name

Signed-off-by: andresmr <[email protected]>

Author: andresmr

tracker/src/main/kotlin/org/dhis2/tracker/relationships/data/RelationshipsRepository.kt

@@ -268,11 +268,13 @@ abstract class RelationshipsRepository(
     ): String {
         return when (entitySide) {
             RelationshipConstraintType.FROM -> {
-                relationshipType.fromToName() ?: relationshipType.displayName() ?: ""
+                relationshipType.fromToName() ?: relationshipType.displayName()
+                ?: resources.getString(R.string.relationship)
             }
 
             RelationshipConstraintType.TO -> {
-                relationshipType.toFromName() ?: relationshipType.displayName() ?: ""
+                relationshipType.toFromName() ?: relationshipType.displayName()
+                ?: resources.getString(R.string.relationship)
             }
         }
     }

tracker/src/main/res/values/strings.xml

@@ -7,4 +7,5 @@
     <string name="remove_some_relationships_title">Remove %d selected relationships?</string>
     <string name="remove_some_relationships_desc">The %d selected relationships will be deleted. This action cannot be undone.</string>
     <string name="show_number_more">Show %d more...</string>
+    <string name="relationship">Relationship</string>
 </resources>