Merge "Add Emergency callback mode shell command" into sc-dev am: 4fe89b2230

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/13668046

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ib47e9192252cc60f6b576715f00d849fb609cee5

telephony/java/com/android/internal/telephony/ITelephony.aidl

@@ -2054,6 +2054,11 @@ interface ITelephony {
      */
     int setImsProvisioningString(int subId, int key, String value);
 
+    /**
+     * Start emergency callback mode for testing.
+     */
+    void startEmergencyCallbackMode();
+
     /**
      * Update Emergency Number List for Test Mode.
      */