Refactor SquashedLocalChanges to LocalChanges

Author: ndegwamartin

engine/src/main/java/com/google/android/fhir/FhirEngine.kt

@@ -96,7 +96,7 @@ interface FhirEngine {
    * an empty list.
    */
   suspend fun getLocalChanges(type: ResourceType, id: String): List<LocalChange>
-  suspend fun getUnsyncedLocalChanges(): List<SquashedLocalChange>
+  suspend fun getUnsyncedLocalChanges(): List<LocalChange>
   /**
    * Purges a resource from the database based on resource type and id without any deletion of data
    * from the server.