Placing this in your ROM is actually quite easy.
Firstly, either compile yourself using the instructions, or head over to UltimaROM.com and get a recompiled APK. The pre-compiled version is much quicker.
You need the version of the file that corresponds to the Android version of your ROM, and your ARM CPU architecture.
Install ADB and run this command
adb shell
cat /proc/cpuinfoYou may see "armeabi", armeabi-v7a or arm64-v8a
This APK only supports from Android 4.0 to 5.0+
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If you are on a ROM that is earlier than Kitkat, then you need the "v11" zip
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If you are on a ROM that is Kitkat, then you need the "v19" zip
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If you are on a ROM that is Lollipop, then you need the "v21" zip
Now you've got the zip, extract it and drag and drop into your system folder