Split fstab mount into 2 phases

This will make it possible to start some key services before mounting
data partition

(cherry picked from commit abfbec342fdd2fc9d139a88a2d950953918e1b4e)

Bug: 30118894
Change-Id: Ia9f8cc035de6cc0df9a61605864915efa0266d7f
diff --git a/fs_mgr/fs_mgr_main.c b/fs_mgr/fs_mgr_main.c
index b3f131e..33a7496 100644
--- a/fs_mgr/fs_mgr_main.c
+++ b/fs_mgr/fs_mgr_main.c
@@ -95,7 +95,7 @@
     fstab = fs_mgr_read_fstab(fstab_file);
 
     if (a_flag) {
-        return fs_mgr_mount_all(fstab);
+        return fs_mgr_mount_all(fstab, MOUNT_MODE_DEFAULT);
     } else if (n_flag) {
         return fs_mgr_do_mount(fstab, n_name, n_blk_dev, 0);
     } else if (u_flag) {