Include common names for Magisk app in list of flashable zip files.

We introduce a new XML element prfxfilter for file name prefix
filtering, e.g. Magisk- .

The file is first matched against the list of extensions and, if there's
no match, then matched against the list of prefixes. An extension or
prefix may be equal to the whole filename.

Change-Id: I46a985c7298799793911948bc74296bebb306d9e
6 files changed