fix(datastore): cannot saving boolean as integer in SQLite (#754)

* fix(datastore): cannot saving boolean as integer in SQLite

* fix unit test

* Apply the fix to double type field as well

Author: HuiSF

packages/amplify_datastore/android/src/main/kotlin/com/amazonaws/amplify/amplify_datastore/types/model/FlutterModelFieldType.kt

@@ -59,12 +59,12 @@ data class FlutterModelFieldType(val map: Map<String, Any>) {
         return when (fieldType) {
             "string" -> String::class.java
             "int" -> Integer::class.java
-            "double" -> Double::class.java
+            "double" -> Double::class.javaObjectType
             "date" -> Temporal.Date::class.java
             "dateTime" -> Temporal.DateTime::class.java
             "time" -> Temporal.Time::class.java
             "timestamp" -> Temporal.Timestamp::class.java
-            "bool" -> Boolean::class.java
+            "bool" -> Boolean::class.javaObjectType
             "enumeration" -> String::class.java
             "model" -> Model::class.java
             "collection" -> List::class.java

packages/amplify_datastore/android/src/test/kotlin/com/amazonaws/amplify/amplify_datastore/SchemaData.kt

@@ -266,15 +266,15 @@ val allTypeModelSchema = ModelSchema.builder()
                 "floatType" to
                         ModelField.builder()
                                 .name("floatType")
-                                .javaClassForValue(Double::class.java)
+                                .javaClassForValue(Double::class.javaObjectType)
                                 .targetType("Double")
                                 .isRequired(true)
                                 .isArray(false)
                                 .build(),
                 "boolType" to
                         ModelField.builder()
                                 .name("boolType")
-                                .javaClassForValue(Boolean::class.java)
+                                .javaClassForValue(Boolean::class.javaObjectType)
                                 .targetType("Boolean")
                                 .isRequired(true)
                                 .isArray(false)