Include generated EffectiveConnectionType.java in cronet api jar and JavaDoc

components/cronet/android/BUILD.gn

Index: components/cronet/android/BUILD.gn
diff --git a/components/cronet/android/BUILD.gn b/components/cronet/android/BUILD.gn
index 8534e6bdba7503142dd88f1acea8094f5aa37bbf..99485b52af894a15928f64f36a3706c6e68f2de4 100644
--- a/components/cronet/android/BUILD.gn
+++ b/components/cronet/android/BUILD.gn
@@ -816,11 +816,22 @@ template("jar_src") {
       "--depfile",
       rebase_path(depfile, root_build_dir),
     ]
+
+    if (defined(invoker.src_jars)) {
+      _rebased_src_jars = rebase_path(invoker.src_jars, root_build_dir)
+      args += [ "--src-jar=${_rebased_src_jars}" ]
+    }
+    deps = [
+      ":effective_connection_type_java",
+    ]
   }
 }
 
 jar_src("jar_cronet_api_source") {
   src_dirs = [ "api/src" ]
+
+  # Include generated Java files which should be a part of the API.
+  src_jars = [ "$root_gen_dir/components/cronet/android/effective_connection_type_java.srcjar" ]
   jar_path = "$_package_dir/cronet_api-src.jar"
 }
 
@@ -872,9 +883,14 @@ action("generate_javadoc") {
     "--lib-java-dir",
     rebase_path("$root_build_dir/lib.java/components/cronet/android",
                 root_build_dir),
+
+    # JavaDoc is generated from Cronet's API source jar.
+    "--input-src-jar",
+    rebase_path("$_package_dir/cronet_api-src.jar", root_build_dir),
   ]
   deps = [
     ":cronet_javadoc_classpath",
+    ":jar_cronet_api_source",
   ]
 }