ANDROID: Incremental fs: Fix issues with very large files

Test: incfs_test passes
Bug: 155590527
Signed-off-by: Paul Lawrence <paullawrence@google.com>
Change-Id: Iaecfcd40e8c089d11b34c7aff2090fbfe0c36219
(cherry picked from commit 3e4fa206ce8ae4d3141af7514cb5d3d813cd4290)
Git-commit: e2821247
Git-repo: https://android.googlesource.com/kernel/common/


Signed-off-by: Sayali Lokhande <sayalil@codeaurora.org>