Generate APK for different architectures - FFmpegMediaMetadataRetriever

PLEASE SEE EDIT 1

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I'm busy adding FFmpegMediaMetadataRetriever pre-build .aar files to my project to reduce the Apk file size for each architecture.

This post added the following to his Gradle:

android {
splits {
        // Configures multiple APKs based on ABI.
        abi {
            // Enables building multiple APKs per ABI.
            enable true

            // By default all ABIs are included, so use reset() and include to specify that we only
            // want APKs for x86, armeabi-v7a, and mips.
            reset()

            // Specifies a list of ABIs that Gradle should create APKs for.
            include "x86", "x86_64", "armeabi-v7a", "arm64-v8a"

            // Specifies that we want to also generate a universal APK that includes all ABIs.
            universalApk false
        }
    }
    //...    
}

The FFmpegMediaMetadataRetriever library provide the following .aar files:

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My Questions:

• Should I place the .aar files in my libs folder as it is (without creating folders for each architecture), or should I add it in a folder?
• Which of the above .aar files should I use to support all architectures?
• In the post he also talks about versioning, is this necessary (my application is live and I don't want to mess up the versioning - my current version is 21)?

He implemented versioning like this:

// Map for the version code that gives each ABI a value.
def abiCodes = ['x86':1, 'x86_64':2, 'armeabi-v7a':3, 'arm64-v8a':4]

// APKs for the same app that all have the same version information.
android.applicationVariants.all { variant ->
    // Assigns a different version code for each output APK.
    variant.outputs.each {
        output ->
            def abiName = output.getFilter(OutputFile.ABI)
            output.versionCodeOverride = abiCodes.get(abiName, 0) * 100000 + variant.versionCode
    }
}

I'm looking for someone that has perhaps used the .aar files of FFmpegMediaMetadataRetriever that can give me guidance on how to correctly implement it.

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EDIT 1:

After learning more about different architectures/ABI's, I THINK it is save to say that if I only include armeabi-v7a then most devices would be "covered"? (My minimum sdk is 16).

Does that then mean that I don't have to split the APK and I don't have to worry about versioning?

I can then just import the .aar - armv7-fmmr.aar as normal?

from Generate APK for different architectures - FFmpegMediaMetadataRetriever