Specify that isCellularIdentifierTransparencyEnabled is false by default

The VTS test and setCellularIdentifierTransparencyEnabled were specified as false in previous commits. This comment was missed.

Bug: 315974744
Change-Id: I20c3198e7e787478732ea4084780af32837b6059
Test: atest VtsHalRadioTargetTest
diff --git a/radio/aidl/android/hardware/radio/network/IRadioNetwork.aidl b/radio/aidl/android/hardware/radio/network/IRadioNetwork.aidl
index e2df8dd..5f26195 100644
--- a/radio/aidl/android/hardware/radio/network/IRadioNetwork.aidl
+++ b/radio/aidl/android/hardware/radio/network/IRadioNetwork.aidl
@@ -649,8 +649,8 @@
     /**
      * Get whether pre-auth cellular identifier in-the-clear transparency is enabled. If
      * IRadioNetworkInterface.setCellularIdentifierTransparencyEnabled has been called, this should
-     * return the value of the `enabled` parameter of the last successful call. If it hasn't been
-     * called this should return the default value of true.
+     * return the value of the `enabled` parameter of the last successful call and false if
+     * IRadioNetworkInterface.setCellularIdentifierTransparencyEnabled has not been called yet.
      *
      * @param serial Serial number of request
      *