make ril.cdma.inecmmode system property internal
so that it cannot reveal a system api that requires
READ_PRIVILEGED_PHONE_STATE

Bug: 183410189
Test: adb shell getprop -Z
Change-Id: I65f4121fc300447af7d516676166bc8b0b53b727
diff --git a/private/property_contexts b/private/property_contexts
index 0b9446e..f52b5ee 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -81,6 +81,7 @@
 persist.traced_perf.enable u:object_r:traced_perf_enabled_prop:s0
 persist.vendor.debug.wifi. u:object_r:persist_vendor_debug_wifi_prop:s0
 persist.vendor.overlay.  u:object_r:overlay_prop:s0
+ril.cdma.inecmmode      u:object_r:radio_cdma_ecm_prop:s0 exact bool
 ro.boot.vendor.overlay.  u:object_r:overlay_prop:s0
 ro.boottime.             u:object_r:boottime_prop:s0
 ro.serialno             u:object_r:serialno_prop:s0