Add fusefs_type for FUSE filesystems

Any FUSE filesystem will receive the 'fuse' type when mounted. It is
possible to change this behaviour by specifying the "context=" or
"fscontext=" option in mount().

Because 'fuse' has historically been used only for the emulated storage,
it also received the 'sdcard_type' attribute. Replace the 'sdcard_type'
attribute from 'fuse' with the new 'fusefs_type'. This attribute can be
attached on derived types (such as app_fusefs).

This change:
- Remove the neverallow restriction on this new type. This means any
  custom FUSE implementation can be mounted/unmounted (if the correct
  allow rule is added). See domain.te.
- Change the attribute of 'fuse' from 'sdcard_type' to 'fusefs_type'.
  See file.te.
- Modify all references to 'sdcard_type' to explicitly include 'fuse'
  for compatibility reason.

Bug: 177481425
Bug: 190804537
Test: Build and boot aosp_cf_x86_64_phone-userdebug
Change-Id: Id4e410a049f72647accd4c3cf43eaa55e94c318f
diff --git a/public/hal_wifi_hostapd.te b/public/hal_wifi_hostapd.te
index 12d72b6..55efc3c 100644
--- a/public/hal_wifi_hostapd.te
+++ b/public/hal_wifi_hostapd.te
@@ -23,5 +23,5 @@
 ###
 
 # hal_wifi_hostapd should not trust any data from sdcards
-neverallow hal_wifi_hostapd_server sdcard_type:dir ~getattr;
-neverallow hal_wifi_hostapd_server sdcard_type:file *;
+neverallow hal_wifi_hostapd_server { sdcard_type fuse }:dir ~getattr;
+neverallow hal_wifi_hostapd_server { sdcard_type fuse }:file *;