modem_diagnostics: add rules for getting battery info am: 94660a5a3d am: 7e113d8961 am: d5ae7f574d am: c504bda0fa

Original change: https://android-review.googlesource.com/c/device/google/redbull-sepolicy/+/1881159

Change-Id: I23874345b46bedc5be8b668025e146e7b6c8dbc0
diff --git a/vendor/google/modem_diagnostics.te b/vendor/google/modem_diagnostics.te
index 4e7f3d5..c481738 100644
--- a/vendor/google/modem_diagnostics.te
+++ b/vendor/google/modem_diagnostics.te
@@ -18,4 +18,7 @@
   set_prop(modem_diagnostic_app, vendor_modem_diag_prop)
   set_prop(modem_diagnostic_app, radio_control_prop)
   set_prop(modem_diagnostic_app, vendor_radio_prop)
+
+  allow modem_diagnostic_app sysfs_batteryinfo:file r_file_perms;
+  allow modem_diagnostic_app sysfs_batteryinfo:dir search;
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