Record mediaprovider_tmpfs type for compatibility.

Commit: 3eed3eacfbc2cc9ed1ae698a4ae1f6873b22ad08 added the compatibility
statement for the new mediaprovider app domain, but it missed another
new, private type, mediaprovider_tmpfs, that is automatically created for
all appdomains.  It replaces priv_app_tmpfs, but since both types are
private, they do not need to be added to the actual mapping (vendor policy
cannot use it).

Bug: 62573845
Test: None.  Prebuilt-only change.
Change-Id: I62229a5be74cd928fe0ca82a45b73cb61d6f5223
diff --git a/prebuilts/api/26.0/26.0.ignore.cil b/prebuilts/api/26.0/26.0.ignore.cil
index 5bfa5cc..3228a98 100644
--- a/prebuilts/api/26.0/26.0.ignore.cil
+++ b/prebuilts/api/26.0/26.0.ignore.cil
@@ -11,6 +11,7 @@
     hal_tetheroffload_hwservice
     hal_wifi_offload_hwservice
     kmsg_debug_device
+    mediaprovider_tmpfs
     netd_stable_secret_prop
     sysfs_fs_ext4_features
     timezone_service