Revert "ANDROID: Incremental fs: Fix filled block count from get filled blocks"

This reverts commit 29e40c29.

Set incfs back to rvc shipping incfs

Bug: 178509184
Test: incfs_test passes
Signed-off-by: Paul Lawrence <paullawrence@google.com>
Change-Id: I4587d44b5baa59a879e8ab42ab65bb70ade086ed