Merge "Explicitly require empty list when the device is idle" am: f676c47ee7 am: c9ee5dd615 am: 26bf51ebe6

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1673628

Change-Id: I81609dcea10bea24fbe1984cc630e7852be671de
diff --git a/radio/1.6/IRadioIndication.hal b/radio/1.6/IRadioIndication.hal
index 9788345..05a7585 100644
--- a/radio/1.6/IRadioIndication.hal
+++ b/radio/1.6/IRadioIndication.hal
@@ -107,7 +107,7 @@
     /**
      * Indicates physical channel configurations.
      *
-     * An empty configs list indicates that the radio is in idle mode.
+     * An empty configs list shall be returned when the radio is in idle mode (i.e. RRC idle).
      *
      * @param type Type of radio indication
      * @param configs Vector of PhysicalChannelConfigs