Update sepolicy for GPU profiling properties.

A device must indicate whether GPU profiling is supported or not through
setting these two properties properly. CTS needs to read these two
properties in order to run corresponding compliance tests. Hence need to
update sepolicy for these two properties.

Bug: b/157832445
Test: Test on Pixel 4
Change-Id: I6f400ecbbd5e78b645bb620fa24747e9367c2ff3
Merged-In: I6f400ecbbd5e78b645bb620fa24747e9367c2ff3
diff --git a/private/shell.te b/private/shell.te
index 63757eb..2a2af0f 100644
--- a/private/shell.te
+++ b/private/shell.te
@@ -140,3 +140,6 @@
 get_prop(shell, init_perf_lsm_hooks_prop)
 
 userdebug_or_eng(`set_prop(shell, persist_debug_prop)')
+
+# Allow to read graphics related properties.
+get_prop(shell, graphics_config_prop)