fix usage of debug interceptor

Author: theScrabi

owncloudComLibrary/src/main/java/com/owncloud/android/lib/common/http/HttpClient.java

@@ -31,6 +31,7 @@
 import okhttp3.Cookie;
 import okhttp3.CookieJar;
 import okhttp3.HttpUrl;
+import okhttp3.Interceptor;
 import okhttp3.OkHttpClient;
 import okhttp3.Protocol;
 import okhttp3.TlsVersion;
@@ -58,7 +59,7 @@ public class HttpClient {
     private static Context sContext;
     private static HashMap<String, List<Cookie>> sCookieStore = new HashMap<>();
     private static LogInterceptor sLogInterceptor;
-    private static DebugInterceptor sDebugInterceptor;
+    private static Interceptor sDebugInterceptor;
 
     public static OkHttpClient getOkHttpClient() {
         if (sOkHttpClient == null) {
@@ -131,13 +132,6 @@ public static LogInterceptor getLogInterceptor() {
         return sLogInterceptor;
     }
 
-    public static DebugInterceptor getDebugInterceptor() {
-        if (sDebugInterceptor == null) {
-            sDebugInterceptor = new DebugInterceptor();
-        }
-        return sDebugInterceptor;
-    }
-
     public static List<Cookie> getCookiesFromUrl(HttpUrl httpUrl) {
         return sCookieStore.get(httpUrl.host());
     }