Revert "Revert "vendor: cm: sepolicy: Allow rw-access to system_app_data_file""

This reverts commit cc0d29e157364884cc22e51a3a45950f47721205.

Change-Id: Ie4e1a693600627feddd0984795d0be68a34f2585
diff --git a/sepolicy/priv_app.te b/sepolicy/priv_app.te
new file mode 100644
index 0000000..40a90e4
--- /dev/null
+++ b/sepolicy/priv_app.te
@@ -0,0 +1 @@
+allow priv_app system_app_data_file:file rw_file_perms;
\ No newline at end of file