Support fallocate(2) modes on FUSE

I39f7f69bb615977b8a8e7c84368ed043cdaf7665 added fallocate(2) support
for FUSE conservatively. It was implemented with posix_fallocate(3)
which only supports the default '0' mode in fallocate(2)

Now, we support other modes

Bug: 184920848
Test: Manual
Change-Id: I5965c607a3225fd3b23dc7a41229494d3914c3db
diff --git a/jni/FuseDaemon.cpp b/jni/FuseDaemon.cpp
index a482e01..833e9c6 100755
--- a/jni/FuseDaemon.cpp
+++ b/jni/FuseDaemon.cpp
@@ -749,13 +749,8 @@
     ATRACE_CALL();
     struct fuse* fuse = get_fuse(req);
 
-    if (mode) {
-        fuse_reply_err(req, EOPNOTSUPP);
-        return;
-    }
-
     handle* h = reinterpret_cast<handle*>(fi->fh);
-    auto err = posix_fallocate(h->fd, offset, length);
+    auto err = fallocate(h->fd, mode, offset, length);
     fuse_reply_err(req, err);
 }