Vulkan: fix a typo

Fixes: 140609421
Test: build, flash and boot
Change-Id: I7548bf733b32861c8007cee63df954022c111a1d
diff --git a/vulkan/libvulkan/api.cpp b/vulkan/libvulkan/api.cpp
index 24039b1..4725344 100644
--- a/vulkan/libvulkan/api.cpp
+++ b/vulkan/libvulkan/api.cpp
@@ -144,7 +144,7 @@
     }
 
     void GetLayersFromSettings() {
-        // These will only be available if conditions are met in GraphicsEnvironemnt
+        // These will only be available if conditions are met in GraphicsEnvironment
         // gpu_debug_layers = layer1:layer2:layerN
         const std::string layers = android::GraphicsEnv::getInstance().getDebugLayers();
         if (!layers.empty()) {