What is “platformBuildVersionCode” in AndroidManifest.xml?

问题

For what reason platformBuildVersionCode and platformBuildVersionName are mentioned in Android Manifest file? Already android:versionCode and android:versionName also mentioned.

android:versionCode="8762015"android:versionName="0.3.6" package="com.android.app"
platformBuildVersionCode="19" platformBuildVersionName="4.4.2"

I need reason for mentioning that.

来源：https://stackoverflow.com/questions/32500911/what-is-platformbuildversioncode-in-androidmanifest-xml