[pm] do not delete data dir for uninstalls with -k

Packages deleted with DELETE_KEEP_DATA is now marked as not-installed.
This CL prevents their data dir from being deleted during reboots.

BUG: 300051780
Test: manual; will add hostside tests

Change-Id: I19cd7feb9854f86f893659757a612f410597100c
1 file changed