Add ITelephonyDebugSubscriber.aidl

It can be used to subscribe for telephony debug events.

Change-Id: I6f17b0409f1117abd2d4caac99d3301c43134c75
diff --git a/Android.mk b/Android.mk
index 3bc33bf..9192e96 100644
--- a/Android.mk
+++ b/Android.mk
@@ -406,6 +406,7 @@
 	telephony/java/com/android/internal/telephony/ISub.aidl \
 	telephony/java/com/android/internal/telephony/ITelephony.aidl \
 	telephony/java/com/android/internal/telephony/ITelephonyDebug.aidl \
+	telephony/java/com/android/internal/telephony/ITelephonyDebugSubscriber.aidl \
 	telephony/java/com/android/internal/telephony/ITelephonyRegistry.aidl \
 	telephony/java/com/android/internal/telephony/IWapPushManager.aidl \
 	wifi/java/android/net/wifi/IWifiManager.aidl \