Garmin: Ignore agps request if etag matches

Some watches reboot on http 304

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/garmin/agps/AgpsHandler.java

@@ -62,8 +62,9 @@ public class AgpsHandler {
                     LOG.debug("agps request hash = {}, file hash = {}", ifNoneMatch, etag);
 
                     if (etag.equals(ifNoneMatch)) {
-                        response.setStatus(304);
-                        return response;
+                        // FIXME: the 304 reboots some watches, so just ignore the request if the hash matches
+                        //response.setStatus(304);
+                        return null;
                     }
                 }
 

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/garmin/http/HttpHandler.java

@@ -63,7 +63,9 @@ public class HttpHandler {
         }
 
         if (response == null) {
-            return null;
+            return GdiHttpService.HttpService.RawResponse.newBuilder()
+                    .setStatus(GdiHttpService.HttpService.Status.UNKNOWN_STATUS)
+                    .build();
         }
 
         LOG.debug("Http response status={}", response.getStatus());

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/garmin/http/WeatherHandler.java

@@ -87,9 +87,7 @@ public class WeatherHandler {
             }
             default:
                 LOG.warn("Unknown weather path {}", path);
-                final GarminHttpResponse response = new GarminHttpResponse();
-                response.setStatus(404);
-                return response;
+                return null;
         }
 
         final String json = GSON.toJson(weatherData);