TBR: reader/android: show where the logs are stored

Change-Id: I865d96650d73c8f01a0dbc8083537f5d4c51af97
diff --git a/android/app/src/main/java/io/v/android/apps/reader/UserActionLogger.java b/android/app/src/main/java/io/v/android/apps/reader/UserActionLogger.java
index c91b9a3..15d98df 100644
--- a/android/app/src/main/java/io/v/android/apps/reader/UserActionLogger.java
+++ b/android/app/src/main/java/io/v/android/apps/reader/UserActionLogger.java
@@ -66,6 +66,8 @@
             dir.mkdirs();
         }
 
+        Log.i(TAG, "User action logs are saved at: " + dir.getAbsolutePath());
+
         // Avoid having colons in the start timestamp
         SimpleDateFormat formatter = new SimpleDateFormat(
                 "yyyyMMdd-HHmmss.SSS", Locale.getDefault());