[appmgr] Preflight for SEC-307

Add "deprecated-ambient-replace-as-executable" sandbox feature to
web runner tests

Change-Id: I178ec66f74e4b7b30d12684db72350fb66d769fc
diff --git a/tests/web_runner_tests/meta/web_runner_integration_tests.cmx b/tests/web_runner_tests/meta/web_runner_integration_tests.cmx
index af8b90c..ca7500b 100644
--- a/tests/web_runner_tests/meta/web_runner_integration_tests.cmx
+++ b/tests/web_runner_tests/meta/web_runner_integration_tests.cmx
@@ -16,6 +16,9 @@
         "binary": "test/web_runner_integration_tests"
     },
     "sandbox": {
+        "features": [
+            "deprecated-ambient-replace-as-executable"
+        ],
         "services": [
             "fuchsia.posix.socket.Provider",
             "fuchsia.net.NameLookup",
diff --git a/tests/web_runner_tests/meta/web_runner_pixel_tests.cmx b/tests/web_runner_tests/meta/web_runner_pixel_tests.cmx
index af436e6..918db4f 100644
--- a/tests/web_runner_tests/meta/web_runner_pixel_tests.cmx
+++ b/tests/web_runner_tests/meta/web_runner_pixel_tests.cmx
@@ -25,7 +25,8 @@
     },
     "sandbox": {
         "features": [
-            "shell-commands"
+            "shell-commands",
+            "deprecated-ambient-replace-as-executable"
         ],
         "services": [
             "fuchsia.fonts.Provider",