Vold: Clean up code related to foreign dex use

We simplified the way we track whether or not a dex file is used by
other apps. DexManger in the framework keeps track of the data and we
no longer need file markers on disk.

Test: device boots, foreign dex markers are not created anymore

Bug: 32871170
Change-Id: Id0360205b019be92049f36eab4339f4736e974f4
3 files changed