Fix crash in android tv-app when handling level commands (#33409)

diff --git a/examples/tv-app/android/java/LevelManager.cpp b/examples/tv-app/android/java/LevelManager.cpp
index 4fc392d..873c2e9 100644
--- a/examples/tv-app/android/java/LevelManager.cpp
+++ b/examples/tv-app/android/java/LevelManager.cpp
@@ -83,6 +83,7 @@
 
 jboolean LevelManager::SetLevel(jint endpoint, jint value)
 {
+    chip::DeviceLayer::StackLock stack;
     chip::Protocols::InteractionModel::Status status = app::Clusters::LevelControl::Attributes::CurrentLevel::Set(
         static_cast<chip::EndpointId>(endpoint), static_cast<uint8_t>(value));
     return status == chip::Protocols::InteractionModel::Status::Success;