(Done) Upgrade BasicWidevine sample to track 2 SDK.

[sxian0613]

Purpose

• Upgrade BasicWidevine sample to track 2 SDK.

How to Test

• Get the code

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]

• Test the code

Configure appsettings.json with appropriate access values.
Open a terminal window, go to the root folder of this project, run `mvn clean compile`.
Execute `mvn exec:java`, then follow the instructions in the output console.

What to Check

Verify that the following are valid

• Copy the link showing in the terminal window after executing mvn exec:java to the browser and check the video.

[johndeu]

Maybe this line is returning an array? I see that previous code use .first()