<UserEventLogging> Log app launches

b/26494415

1) Current Logger can capture taps from
- homescreen
- folder inside homescreen
- apps prediction
- all apps a-z
- tap from hotseat
2) Deprecate LauncherCallback methods that is no longer needed

Future CL.
3) Stats and Logger will be merged. Bundle used for Stats can be
replaced with LauncherLogProto
4) Logging anything else other than app launches

Change-Id: Id52eb615f66142017b5c490a220ce6654d325681

src/com/android/launcher3/Launcher.java

@@ -108,6 +108,7 @@ import com.android.launcher3.dragndrop.DragController;
 import com.android.launcher3.dragndrop.DragLayer;
 import com.android.launcher3.dragndrop.DragView;
 import com.android.launcher3.model.WidgetsModel;
+import com.android.launcher3.userevent.Logger;
 import com.android.launcher3.util.ComponentKey;
 import com.android.launcher3.util.LongArrayMap;
 import com.android.launcher3.util.TestingUtils;
@@ -367,6 +368,8 @@ public class Launcher extends Activity
     }
 
     private Stats mStats;
+    private Logger mUserEventLogger;
+
     public FocusIndicatorView mFocusHandler;
     private boolean mRotationEnabled = false;
 
@@ -424,6 +427,7 @@ public class Launcher extends Activity
         mDragController = new DragController(this);
         mStateTransitionAnimation = new LauncherStateTransitionAnimation(this);
 
+        mUserEventLogger = new Logger(this);
         mStats = new Stats(this);
 
         mAppWidgetManager = AppWidgetManagerCompat.getInstance(this);
@@ -627,6 +631,7 @@ public class Launcher extends Activity
     public Stats getStats() {
         return mStats;
     }
+    public Logger getLogger() {return mUserEventLogger; }
 
     public boolean isDraggingEnabled() {
         // We prevent dragging when we are loading the workspace as it is possible to pick up a view
@@ -950,6 +955,7 @@ public class Launcher extends Activity
         }
 
         super.onResume();
+        mUserEventLogger.resetElapsedSessionMillis();
 
         // Restore the previous launcher state
         if (mOnResumeState == State.WORKSPACE) {
@@ -3331,6 +3337,7 @@ public class Launcher extends Activity
             getWindow().getDecorView()
                     .sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
         }
+        mUserEventLogger.resetElapsedContainerMillis();
         return changed;
     }