Fix and re-enable the commissioner-generated-passcode CI test for Linux tv casting (project-chip#34598)

Author: shaoltan-amazon

.github/workflows/examples-linux-tv-casting-app.yaml

@@ -72,16 +72,13 @@ jobs:
                     "python3 ./scripts/tests/run_tv_casting_test.py"
               timeout-minutes: 2 # Comment this out to debug if GitHub Action times out.
 
-            # TODO: this test is flaky and was disabled
-            #       https://github.com/project-chip/connectedhomeip/issues/34598
-            #
-            #  - name:
-            #        Test casting from Linux tv-casting-app to Linux tv-app -
-            #        Commissioner Generated Passcode
-            #    run: |
-            #        ./scripts/run_in_build_env.sh \
-            #          "python3 ./scripts/tests/run_tv_casting_test.py --commissioner-generated-passcode=True"
-            #    timeout-minutes: 2 # Comment this out to debug if GitHub Action times out.
+            - name:
+                  Test casting from Linux tv-casting-app to Linux tv-app -
+                  Commissioner Generated Passcode
+              run: |
+                  ./scripts/run_in_build_env.sh \
+                    "python3 ./scripts/tests/run_tv_casting_test.py --commissioner-generated-passcode=True"
+              timeout-minutes: 2 # Comment this out to debug if GitHub Action times out.
 
             - name: Uploading Size Reports
               uses: ./.github/actions/upload-size-reports

src/platform/Linux/bluez/BluezAdvertisement.cpp

@@ -119,7 +119,11 @@ CHIP_ERROR BluezAdvertisement::Init(BluezAdapter1 * apAdapter, const char * aAdv
     GAutoPtr<char> rootPath;
     g_object_get(G_OBJECT(mEndpoint.GetGattApplicationObjectManager()), "object-path", &rootPath.GetReceiver(), nullptr);
     g_snprintf(mAdvPath, sizeof(mAdvPath), "%s/advertising", rootPath.get());
-    g_strlcpy(mAdvUUID, aAdvUUID, sizeof(mAdvUUID));
+
+    if (aAdvUUID != nullptr)
+    {
+        g_strlcpy(mAdvUUID, aAdvUUID, sizeof(mAdvUUID));
+    }
 
     if (aAdvName != nullptr)
     {