Converted device object test to use common read-write property test. Extended the basic BACnet device object example API. (#1106)

* Converted device object test to use common read-write property test. Extended the basic BACnet device object example API.

* Created BACnet/IP and COV test mocks to enable device object testing with less dependencies.

test/bacnet/basic/object/test/apdu_mock.c

@@ -9,6 +9,34 @@
 #include <zephyr/ztest.h>
 #include <bacnet/basic/service/h_apdu.h>
 
+bool apdu_service_supported(BACNET_SERVICES_SUPPORTED service_supported)
+{
+    (void)service_supported;
+    return true;
+}
+
+static uint16_t Timeout_Milliseconds = 1000;
+uint16_t apdu_timeout(void)
+{
+    return Timeout_Milliseconds;
+}
+
+void apdu_timeout_set(uint16_t milliseconds)
+{
+    Timeout_Milliseconds = milliseconds;
+}
+
+static uint8_t Number_Of_Retries = 3;
+uint8_t apdu_retries(void)
+{
+    return Number_Of_Retries;
+}
+
+void apdu_retries_set(uint8_t value)
+{
+    Number_Of_Retries = value;
+}
+
 uint16_t apdu_decode_confirmed_service_request(
     uint8_t *apdu,
     uint16_t apdu_len,