Without missing all the AOSP code, it's hard to say. Unfortunately, I donβt even know where to ask to go through all this code.
However, the javax.xml libraries. * Included in VM Dalvik. Dalvik V.M. It has been a deactivated virtual machine since the beginning of Android (I saw it because now in Lollipop, the standard is ART) Thus, it is probably a pretty safe bet to assume that the Android Framework uses javax.xml.parsers to parse xml files from apk files.
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