Clean up PREF_USABILITY_STUDY_MODE

- Refer to a common default value in DebugSettings
- Make PREF_USABILITY_STUDY_MODE independent of the ResearchLogger
- ResearchLogger uses its own preference through ResearchSettings

multi-project commit with Ie0df836c9d779eba484b522666ec357f4e234823

Change-Id: I88547a2f619db6e7364abbbec12f9f76855dd11a

1 files changed, 4 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/latin/LatinImeLogger.java b/java/src/com/android/inputmethod/latin/LatinImeLogger.java
index e4e8b94b2..3f2b0a3f4 100644
--- a/java/src/com/android/inputmethod/latin/LatinImeLogger.java
+++ b/java/src/com/android/inputmethod/latin/LatinImeLogger.java
@@ -37,6 +37,10 @@ public final class LatinImeLogger implements SharedPreferences.OnSharedPreferenc
     public static void commit() {
     }
 
+    public static boolean getUsabilityStudyMode(final SharedPreferences prefs) {
+        return false;
+    }
+
     public static void onDestroy() {
     }