Added CI step for building with validation layers

Author: gaaclarke

ci/builders/linux_android_debug_engine.json

@@ -134,6 +134,27 @@
                 ]
             }
         },
+        {
+            "archives": [],
+            "drone_dimensions": [
+                "device_type=none",
+                "os=Linux"
+            ],
+            "gn": [
+                "--android",
+                "--android-cpu=arm64",
+                "--no-lto",
+                "--enable-vulkan-validation-layers"
+            ],
+            "name": "android_debug_arm64_validation_layers",
+            "ninja": {
+                "config": "android_debug_arm64_validation_layers",
+                "targets": [
+                    "flutter",
+                    "flutter/shell/platform/android:abi_jars"
+                ]
+            }
+        },
         {
             "archives": [
                 {