Check missing headers in the build on Android bots

testing/buildbot/chromium.linux.json

Index: testing/buildbot/chromium.linux.json
diff --git a/testing/buildbot/chromium.linux.json b/testing/buildbot/chromium.linux.json
index 9ed057d0308a5a708ddbce976e47f12ec179c62f..20a70f5967b5b31f1da191e624a25f60fd90e752 100644
--- a/testing/buildbot/chromium.linux.json
+++ b/testing/buildbot/chromium.linux.json
@@ -2,6 +2,12 @@
   "Android Arm64 Builder (dbg)": {
     "additional_compile_targets": [
       "all"
+    ],
+    "scripts": [
+      {
+        "name": "check_gn_headers",
+        "script": "check_gn_headers.py"
+      }
     ]
   },
   "Android Builder": {
@@ -18,6 +24,12 @@
   "Android Clang Builder (dbg)": {
     "additional_compile_targets": [
       "all"
+    ],
+    "scripts": [
+      {
+        "name": "check_gn_headers",
+        "script": "check_gn_headers.py"
+      }
     ]
   },
   "Android Tests": {