CEC: Enable log for non-user builds

This helps get better bugreports for dogfooding. Accompanying bug
will be kept track of to ensure the log is turned off before
shipping. See ag/175890 for reference.

Bug: 18471978
Change-Id: Ic67d64526fee3c52fee6c7f1e0201ead4ae6a3e7

services/core/java/com/android/server/hdmi/HdmiLogger.java

@@ -17,6 +17,7 @@
 package com.android.server.hdmi;
 
 import android.annotation.Nullable;
+import android.os.Build;
 import android.os.SystemClock;
 import android.util.Pair;
 import android.util.Slog;
@@ -41,7 +42,7 @@ final class HdmiLogger {
     // Logging duration for same error message.
     private static final long ERROR_LOG_DURATTION_MILLIS = 20 * 1000;  // 20s
 
-    private static final boolean DEBUG = false;
+    private static final boolean IS_USER_BUILD = "user".equals(Build.TYPE);
 
     private static final ThreadLocal<HdmiLogger> sLogger = new ThreadLocal<>();
 
@@ -82,7 +83,7 @@ final class HdmiLogger {
     }
 
     private void debugInternal(String logMessage) {
-        if (!DEBUG) {
+        if (IS_USER_BUILD) {
             return;
         }
         Slog.d(TAG, logMessage);