Add sepolicy for hal_wifi to access /proc/modules

Add sepolicy to hal_wifi to access /proc/modules
to check if Wi-Fi driver is loaded.

Bug: 62013623
Change-Id: Ib700170095b183a1e0e6a36b64e7c65655174f21

public/hal_wifi.te

@@ -18,3 +18,5 @@ allow hal_wifi self:netlink_socket create_socket_perms_no_ioctl;
 allow hal_wifi self:netlink_generic_socket create_socket_perms_no_ioctl;
 # hal_wifi writes firmware paths to this file.
 allow hal_wifi sysfs_wlan_fwpath:file { w_file_perms };
+# allow hal_wifi to access /proc/modules to check if Wi-Fi driver is loaded
+allow hal_wifi proc_modules:file { getattr open read };
\ No newline at end of file