MultiDex patching not working on Android 4.4

[giacomoferretti]

On Android 4.4 only the first classes.dex is optimized. The secondary dex files, like classes2.dex, are optimized later using the MultiDex support library and they are store under /data/data/packagename/code_cache/secondary_dexes/packagename.apk.classesN.zip for every file. After extracting the single dex files, the MultiDex support library optimize them and saves them under /data/data/packagename/code_cache/secondary_dexes/packagename.apk.classesN.dex.