Amazon S3 Error: The request signature we calculated does not match the signature you provided. Check your key and signing method

I am trying to get an object from my bucket but I always get the "signature does not match" error. I got my signature generation function from AWS sample code so I am sure that this works. I also tested the upload function and it works. I am only having trouble with the get object function. I spent a huge amount of hours verifying all scenarios/answers in this post but nothing worked. So here I am seeking your help.

Am I missing something in the headers? Here is a sample canonical request that gets created:

GET
/index.html
    
host:<bucketname>.s3.amazonaws.com
x-amz-content-sha256:e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
x-amz-date:20211127T120453Z
    
host;x-amz-content-sha256;x-amz-date
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

EDIT1:

I tried the AWS sample code by compiling it using javac, then ran it, the get object function works fine. But when added into my Android project, it does not work. To make sure that I copy the sample code as is, I generated its jar file and included the resulting jar file in my project. Still, same issue. This is frustrating. Argg!

EDIT2: Minimal reproducible example

1. Download the sample code from the link above
2. Add the code into your Android project except for com.amazonaws.services.s3.sample.RunAllSamples class.
3. Add this call in one of your activities: GetS3ObjectSample.getS3Object(<bucketName>, <regionName>, <awsAccessKey>, <awsSecretKey>);

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