Add type for APEX data directories.

This adds a new apex_module_data_file type for the APEX data directories
under /data/misc/apexdata and /data/misc_[de|ce]/<u>/apexdata.

Permission is given for vold to identify which APEXes are present and
create the corresponding directories under apexdata in the ce/de user
directories.

See go/apex-data-directories.

Bug: 141148175
Test: Built & flashed, checked directories were created.
Change-Id: I95591e5fe85fc34f7ed21e2f4a75900ec2cfacfa
diff --git a/private/file_contexts b/private/file_contexts
index 69b6c58..6ffbf10 100644
--- a/private/file_contexts
+++ b/private/file_contexts
@@ -495,6 +495,7 @@
 
 # Misc data
 /data/misc/adb(/.*)?            u:object_r:adb_keys_file:s0
+/data/misc/apexdata(/.*)?       u:object_r:apex_module_data_file:s0
 /data/misc/apns(/.*)?           u:object_r:radio_data_file:s0
 /data/misc/audio(/.*)?          u:object_r:audio_data_file:s0
 /data/misc/audioserver(/.*)?    u:object_r:audioserver_data_file:s0
@@ -578,6 +579,10 @@
 /data/misc_de/[0-9]+/rollback(/.*)?       u:object_r:rollback_data_file:s0
 /data/misc_ce/[0-9]+/rollback(/.*)?       u:object_r:rollback_data_file:s0
 
+# Apex data directories
+/data/misc_de/[0-9]+/apexdata(/.*)?       u:object_r:apex_module_data_file:s0
+/data/misc_ce/[0-9]+/apexdata(/.*)?       u:object_r:apex_module_data_file:s0
+
 #############################
 # Expanded data files
 #