Change self recovery log level from wtf to error

Reasons:
1. These recovery events are reported to metrics as well.
2. These recovery events are not severe and don't impact
user experiecne.
3. We usually can't get useful information from the wtf log
snippets.

Bug: 66996979
Test: compile, unit tests
Change-Id: I713a243927bf935aaf356289be42389f1ba0d5ea
diff --git a/service/java/com/android/server/wifi/SelfRecovery.java b/service/java/com/android/server/wifi/SelfRecovery.java
index 21a3e0a..e39e0d5 100644
--- a/service/java/com/android/server/wifi/SelfRecovery.java
+++ b/service/java/com/android/server/wifi/SelfRecovery.java
@@ -72,7 +72,7 @@
             Log.e(TAG, "Invalid trigger reason. Ignoring...");
             return;
         }
-        Log.wtf(TAG, "Triggering recovery for reason: " + REASON_STRINGS[reason]);
+        Log.e(TAG, "Triggering recovery for reason: " + REASON_STRINGS[reason]);
         if (reason == REASON_WIFICOND_CRASH || reason == REASON_HAL_CRASH) {
             trimPastRestartTimes();
             // Ensure there haven't been too many restarts within MAX_RESTARTS_TIME_WINDOW