vold: remove overprovision area from free segments

overprovision space and reserved area should be subtracted when we
calculate free segments count in GC for data blocks.

Test: check Vold setGCUrgentPace log
Bug: 202283480
Bug: 181079477
Signed-off-by: Daeho Jeong <daehojeong@google.com>
Change-Id: I7b749588ff794ff0429e17a787d83bcc19af0ec1
1 file changed