adb: don't try to pull character or block devices.

Change-Id: I1a9e2c0097fe9c4017a9b338e812366c8e1154f0
diff --git a/file_sync_client.cpp b/file_sync_client.cpp
index 268a11f..03b59dc 100644
--- a/file_sync_client.cpp
+++ b/file_sync_client.cpp
@@ -852,7 +852,8 @@
             continue;
         }
 
-        if (S_ISREG(mode) || S_ISLNK(mode) || S_ISCHR(mode) || S_ISBLK(mode)) {
+        if (S_ISREG(mode) || S_ISLNK(mode)) {
+            // TODO(b/25601283): symlinks shouldn't be handled as files.
             std::string path_holder;
             struct stat st;
             if (stat(dst_path, &st) == 0) {