Updating Webview On Aosp Android 6.0

I am working on a device based on AOSP Android 6.0 (Marshmallow). I wanted to update standard Android webview to the latest version for using the latest JavaScript. For this I repl

Solution 1:

Finally we have found that the problem was because webmusic.apk was not signed with the system signature. That's why it was not properly installed.
Steps from the question How to sign Android app with system signature? solved the issue.