ANDROID: sdcardfs: Fix sdcardfs_getattr()

The getattr inode operation is refactored upstream,
a528d35e ("statx: Add a system call to make enhanced file info available"),
to take two additional arguments: a u32 request_mask and an unsigned
int flags that indicate the synchronisation mode.
Fix sdcardfs_getattr() accordingly.

Signed-off-by: Amit Pundir <amit.pundir@linaro.org>