[RESTRICT AUTOMERGE] Log to EventLog on prepareUserStorage failure am: 2f2e7d84f8

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17452585

Change-Id: Ibb1049aa4c143ba2d4e04a021cb2546519a1996e
Ignore-AOSP-First: this is an automerge
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

services/core/java/com/android/server/StorageManagerService.java

@@ -117,6 +117,7 @@ import android.text.format.DateUtils;
 import android.util.ArrayMap;
 import android.util.AtomicFile;
 import android.util.DataUnit;
+import android.util.EventLog;
 import android.util.Log;
 import android.util.Pair;
 import android.util.Slog;
@@ -2848,6 +2849,7 @@ class StorageManagerService extends IStorageManager.Stub
         try {
             mVold.prepareUserStorage(volumeUuid, userId, serialNumber, flags);
         } catch (Exception e) {
+            EventLog.writeEvent(0x534e4554, "224585613", -1, "");
             Slog.wtf(TAG, e);
             // Make sure to re-throw this exception; we must not ignore failure
             // to prepare the user storage as it could indicate that encryption