add OTA emberAfGetClusterServerEndpointIndex

src/controller/java/CHIPDeviceController-JNI.cpp

@@ -2357,3 +2357,20 @@ CHIP_ERROR N2J_NetworkLocation(JNIEnv * env, jstring ipAddress, jint port, jint
 exit:
     return err;
 }
+
+namespace {
+constexpr EndpointId kSupportedEndpoint = 0;
+} // anonymous namespace
+
+/**
+ * Called by the OTA provider cluster server to determine an index
+ * into its array.
+ */
+uint16_t emberAfGetClusterServerEndpointIndex(EndpointId endpoint, ClusterId cluster, uint16_t fixedClusterServerEndpointCount)
+{
+    if (endpoint == kSupportedEndpoint && cluster == OtaSoftwareUpdateProvider::Id) {
+        return 0;
+    }
+
+    return UINT16_MAX;
+}