camerad: fix POLLPRI event check in poll loop (#33591)

fix event check in poll loop to validate POLLPRI

system/camerad/cameras/camera_qcom2.cc

@@ -374,7 +374,7 @@ void camerad_thread() {
       break;
     }
 
-    if (!fds[0].revents) continue;
+    if (!(fds[0].revents & POLLPRI)) continue;
 
     struct v4l2_event ev = {0};
     ret = HANDLE_EINTR(ioctl(fds[0].fd, VIDIOC_DQEVENT, &ev));