Revert "ANDROID: Incremental fs: Fix misuse of cpu_to_leXX and poll return"

This reverts commit 6851a6dc.

Set incfs back to rvc shipping incfs

Bug: 178509184
Test: incfs_test passes
Signed-off-by: Paul Lawrence <paullawrence@google.com>
Change-Id: I72978b9f3a5f1cf9e32817e72b6272e53f3f72d0