betterbug: Fixed sepolicy related to mediaserver

Added mediaserver sepolicy for betterbug

Bug: 237287659
Test: Run same video capture on Betterbug to confirm video can be
captured.
Change-Id: Ifcb2bdba6f8036805f311a9d6b76227bf63e39e3
Signed-off-by: George Lee <geolee@google.com>
diff --git a/battery_mitigation/sepolicy/better_bug_app.te b/battery_mitigation/sepolicy/better_bug_app.te
index 506e832..41d403b 100644
--- a/battery_mitigation/sepolicy/better_bug_app.te
+++ b/battery_mitigation/sepolicy/better_bug_app.te
@@ -6,6 +6,7 @@
   allow better_bug_app app_api_service:service_manager find;
   allow better_bug_app system_api_service:service_manager find;
   allow better_bug_app privapp_data_file:file execute;
+  allow better_bug_app mediaserver_service:service_manager find;
   get_prop(better_bug_app, default_prop);
   get_prop(better_bug_app, vendor_startup_bugreport_requested_prop)
 ')