kitakami-common: sepolicy: Allow vold to read the tee_prop

This fixes Encryption on (at least) tone devices

Change-Id: Ic09e6a86620e3ec8ea392e5a01fabdddb5c658eb

sepolicy/vendor/vold.te

@@ -2,3 +2,4 @@ allow vold diag_data_file:dir { read open ioctl };
 allow vold firmware_file:dir search;
 allow vold firmware_file:file { getattr open read };
 allow vold secd_exec:file { getattr read };
+allow vold tee_prop:file { r_file_perms };