Enable platform_app to use perfetto/trace_data_file permissions in
debug/eng builds.

This change is to allow SystemUI, a platform_app, to start, stop,
and share Perfetto/Winscope traces.

Bug: 305049544
Test: Verified everything works on my local device.
Change-Id: I8fc35a5a570c2199cfdd95418a6caf0c48111c46
diff --git a/private/traced.te b/private/traced.te
index d4e5bec..796095f 100644
--- a/private/traced.te
+++ b/private/traced.te
@@ -28,6 +28,7 @@
 # Allow traceur to pass open file descriptors to traced, so traced can directly
 # write into the output file without doing roundtrips over IPC.
 allow traced traceur_app:fd use;
+allow traced platform_app:fd use;
 allow traced trace_data_file:file { read write };
 
 # Allow perfetto to access the proxy service for notifying Traceur.
@@ -119,6 +120,7 @@
   -traced
   -dumpstate
   -traceur_app
+  -platform_app
   -shell
   -system_server
   -perfetto