Allow apps to search appfuse mount point and open a file on appfuse mount point.

Bug: 29970149
Test: None
Change-Id: I59f49f3bf20d93effde5e1a9a3c1ed64fbecb7a8

public/app.te

@@ -249,7 +249,8 @@ allow { appdomain -isolated_app } hal_graphics_allocator:fd use;
 allow appdomain proc_meminfo:file r_file_perms;
 
 # For app fuse.
-allow appdomain app_fuse_file:file { getattr read append write };
+allow appdomain app_fuse_file:dir rw_dir_perms;
+allow appdomain app_fuse_file:file rw_file_perms;
 
 ###
 ### CTS-specific rules

public/priv_app.te

@@ -79,8 +79,6 @@ allow priv_app exec_type:file { getattr read open };
 # For AppFuse.
 allow priv_app vold:fd use;
 allow priv_app fuse_device:chr_file { read write };
-allow priv_app app_fuse_file:dir rw_dir_perms;
-allow priv_app app_fuse_file:file rw_file_perms;
 
 # /sys and /proc access
 r_dir_file(priv_app, sysfs_type)