Revert "Tighten enforcement of file modes."

This fixes the issue where apps like Facebook and the Play Store
would randomly crash upon opening.

This reverts commit 589cf5e946788062595bd1c509dbf0852e09f466.

Change-Id: Ic17464f488a99ae152426910ac251ab082dc12c9
Signed-off-by: DHO <DHO@dho.im>