sepolicy: qcom: Label custom FM Radio property

Change-Id: I8927185237021a5f0810bed1c0f4f53b15882a34
diff --git a/qcom/private/property_contexts b/qcom/private/property_contexts
new file mode 100644
index 0000000..021afb9
--- /dev/null
+++ b/qcom/private/property_contexts
@@ -0,0 +1,2 @@
+# FM
+hw.fm.                                  u:object_r:exported3_system_prop:s0