Add voip_unittests to gn_isolate_map.pyl

Adding gn isolate configs for //:voip_unittests in order to run it on
bots.

Bug: webrtc:11251
Change-Id: I00636cb136db116a3b90a7aad4c55c4e4697534b
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/172804
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30993}
diff --git a/tools_webrtc/mb/gn_isolate_map.pyl b/tools_webrtc/mb/gn_isolate_map.pyl
index 13d5613..dba0d97 100644
--- a/tools_webrtc/mb/gn_isolate_map.pyl
+++ b/tools_webrtc/mb/gn_isolate_map.pyl
@@ -140,6 +140,10 @@
     "label": "//:video_engine_tests",
     "type": "console_test_launcher",
   },
+  "voip_unittests": {
+    "label": "//:voip_unittests",
+    "type": "console_test_launcher",
+  },
   "webrtc_nonparallel_tests": {
     "label": "//:webrtc_nonparallel_tests",
     "type": "non_parallel_console_test_launcher",