Add missing xctest targets to gn_isolate_map.pyl.

This CL should fix the following error:

MBErr: target "apprtcmobile_tests" not found in //testing/buildbot/gn_isolate_map.pyl
target "sdk_unittests" not found in //testing/buildbot/gn_isolate_map.pyl
target "sdk_framework_unittests" not found in //testing/buildbot/gn_isolate_map.pyl

It looks like the MB analyze wrapper around GN requires the targets to be
in the gn_isolate_map.pyl in order to retrieve the target label.

I am not sure the type is correct.

TBR=phoglund@webrtc.org

Bug: webrtc:11262
Change-Id: I28ab5aa3cb3962ef56f1b85dfc367c377aca06cc
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/172081
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30928}
diff --git a/tools_webrtc/mb/gn_isolate_map.pyl b/tools_webrtc/mb/gn_isolate_map.pyl
index e38c3b8..3536d68 100644
--- a/tools_webrtc/mb/gn_isolate_map.pyl
+++ b/tools_webrtc/mb/gn_isolate_map.pyl
@@ -27,6 +27,10 @@
     "label": "//:android_junit_tests",
     "type": "junit_test",
   },
+  "apprtcmobile_tests": {
+    "label": "//examples:apprtcmobile_tests",
+    "type": "raw",
+  },
   "audio_decoder_unittests": {
     "label": "//modules/audio_coding:audio_decoder_unittests",
     "type": "console_test_launcher",
@@ -94,6 +98,14 @@
     "label": "//:rtc_unittests",
     "type": "console_test_launcher",
   },
+  "sdk_framework_unittests": {
+    "label": "//sdk:sdk_framework_unittests",
+    "type": "raw",
+  },
+  "sdk_unittests": {
+    "label": "//sdk:sdk_unittests",
+    "type": "raw",
+  },
   "slow_tests": {
     "label": "//:slow_tests",
     "type": "console_test_launcher",