Add a module for the WebView Support Library code generator.

For now don't add much code - to avoid having to deal with potential
merge conflicts and code reviews/changes at the same time.

Bug: 68840936
Test: Build the new module.

Change-Id: I253d74c33c731351a22f8b9b6e736d5cbd65e9a8

diff --git a/settings.gradle b/settings.gradle
index 1eccbcf..fd7a5dc 100644
--- a/settings.gradle
+++ b/settings.gradle

@@ -112,6 +112,9 @@
 include ':webkit'
 project(':webkit').projectDir = new File(rootDir, 'webkit')
 
+include ':webkit-codegen'
+project(':webkit-codegen').projectDir = new File(rootDir, 'webkit-codegen')
+
 /////////////////////////////
 //
 // Samples