ANDROID: fs/fuse: Missing header for passthrough

Building the kernel with qcom_defconfig fails as linux/file.h doesn't
seems to be indirectly inherited anymore.
Fix by including the header explicitly.

Fixes: 9ea95836 ("FROMLIST: fuse: Passthrough initialization and release")
Signed-off-by: Alessio Balsini <balsini@google.com>
Change-Id: I3f460d84fe79166f318cf4efd8a386653a25d3a7