Make SettingsValues non-final to testability

Add getter for enableMetricsLogging boolean.

Bug:16522256
Change-Id: Ie9a38efc7861b3d4207562d2bf0344c5c2ae957a

java/src/com/android/inputmethod/latin/settings/SettingsValues.java

@@ -40,7 +40,8 @@ import java.util.Locale;
  * When you call the constructor of this class, you may want to change the current system locale by
  * using {@link com.android.inputmethod.latin.utils.RunInLocale}.
  */
-public final class SettingsValues {
+// Non-final for testing via mock library.
+public class SettingsValues {
     private static final String TAG = SettingsValues.class.getSimpleName();
     // "floatMaxValue" and "floatNegativeInfinity" are special marker strings for
     // Float.NEGATIVE_INFINITE and Float.MAX_VALUE. Currently used for auto-correction settings.
@@ -186,6 +187,10 @@ public final class SettingsValues {
         }
     }
 
+    public boolean isMetricsLoggingEnabled() {
+        return mEnableMetricsLogging;
+    }
+
     public boolean isApplicationSpecifiedCompletionsOn() {
         return mInputAttributes.mApplicationSpecifiedCompletionOn;
     }