Fix capture stall with target apps in root mode

When target apps are specified, the root capture would stall
when matching the uid, because of an infinite loop.

Fixes #467

app/src/main/jni/pcapd/pcapd.c

@@ -136,6 +136,8 @@ static int matches_uid_filter(const int *filter, int uid) {
   while (*filter != -1) {
     if (*filter == uid)
       return 1;
+
+    filter++;
   }
 
   // no match