Extract profile files in their dedicated folder

Current profiles (the ones which have not been used for
compilation) are stored in /data/misc/profiles/cur/0/pkgname/.

Reference profiles (the merged of all user profiles, used for
compilation) are stored in /data/misc/profiles/ref/pkgname.

The profile analysis flow has been changed to use profman
before calling dex2oat. profman decides if there is a need
for compilation and does the merging.

Bug: 26719109
Bug: 26563023
Bug: 26881016

Change-Id: I5a86ed5fd07a28e2e580f9c108428527ba7993b6