[JJI] Expose WebMessageListener related APIs

- addWebMessageListener()
- removeWebMessageListener()

Bug: 918065
Change-Id: Id271f328224942edb962a29fe44617240aa18a5f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2099233Reviewed-by: Nate Fischer <ntfschr@chromium.org>
Commit-Queue: Shimi Zhang <ctzsm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#750282}

android_webview/support_library/java/src/org/chromium/support_lib_glue/SupportLibWebViewChromiumFactory.java

@@ -77,7 +77,7 @@ class SupportLibWebViewChromiumFactory implements WebViewProviderFactoryBoundary
                     Features.MULTI_PROCESS_QUERY,
                     Features.FORCE_DARK,
                     Features.FORCE_DARK_BEHAVIOR + Features.DEV_SUFFIX,
-                    Features.WEB_MESSAGE_LISTENER + Features.DEV_SUFFIX,
+                    Features.WEB_MESSAGE_LISTENER,
                     Features.SET_SUPPORT_LIBRARY_VERSION + Features.DEV_SUFFIX,
             };