DO NOT MERGE Added event logging for config installation failures.

This just logs the directory the data is being written to, which
will tell us whether we've pushed a bad update and are about to
start wedging devices.

Change-Id: Iaaef6d41b2ab18bcce295c583ee13f49e337ed65

Author: gcondra

services/java/com/android/server/EventLogTags.logtags

@@ -156,3 +156,8 @@ option java_package com.android.server
 51200 lockdown_vpn_connecting (egress_net|1)
 51201 lockdown_vpn_connected (egress_net|1)
 51202 lockdown_vpn_error (egress_net|1)
+
+# ---------------------------
+# ConfigUpdateInstallReceiver.java
+# ---------------------------
+51300 config_install_failed (dir|3)

services/java/com/android/server/updatable/ConfigUpdateInstallReceiver.java

@@ -23,8 +23,11 @@
 import android.provider.Settings;
 import android.os.FileUtils;
 import android.util.Base64;
+import android.util.EventLog;
 import android.util.Slog;
 
+import com.android.server.EventLogTags;
+
 import java.io.ByteArrayInputStream;
 import java.io.File;
 import java.io.FileNotFoundException;
@@ -100,6 +103,8 @@ public void run() {
                     }
                 } catch (Exception e) {
                     Slog.e(TAG, "Could not update content!", e);
+                    EventLog.writeEvent(EventLogTags.CONFIG_INSTALL_FAILED,
+                                        updateDir.toString());
                 }
             }
         }.start();