Add action for notifying custom components of missed calls.

Change-Id: I09797e323dda7a5316f42c2a1c20fadbc60f2c6f
diff --git a/telecomm/java/android/telecom/TelecomManager.java b/telecomm/java/android/telecom/TelecomManager.java
index 067e734..232bf0f 100644
--- a/telecomm/java/android/telecom/TelecomManager.java
+++ b/telecomm/java/android/telecom/TelecomManager.java
@@ -367,6 +367,32 @@
             "android.telecom.intent.extra.TTY_PREFERRED";
 
     /**
+     * Broadcast intent action for letting custom component know to show the missed call
+     * notification.
+     * @hide
+     */
+    @SystemApi
+    public static final String ACTION_SHOW_MISSED_CALLS_NOTIFICATION =
+            "android.telecom.action.SHOW_MISSED_CALLS_NOTIFICATION";
+
+    /**
+     * The number of calls associated with the notification.
+     * @hide
+     */
+    @SystemApi
+    public static final String EXTRA_NOTIFICATION_COUNT =
+            "android.telecom.extra.NOTIFICATION_COUNT";
+
+    /**
+     * The number associated with the missed calls. This number is only relevant
+     * when EXTRA_NOTIFICATION_COUNT is 1.
+     * @hide
+     */
+    @SystemApi
+    public static final String EXTRA_NOTIFICATION_PHONE_NUMBER =
+            "android.telecom.extra.NOTIFICATION_PHONE_NUMBER";
+
+    /**
      * The following 4 constants define how properties such as phone numbers and names are
      * displayed to the user.
      */