Moving all-apps predictions to Launcher model

Predictions are loaded and managed by Launcher model and follow
the model lifecycle. They are then bound to the callback which
handles the UI

Bug: 160748731
Change-Id: I4a3ea0698d80fafe94afb4ce66ffa7f4a6a91c68
diff --git a/src/com/android/launcher3/LauncherAppState.java b/src/com/android/launcher3/LauncherAppState.java
index 53e5274..e3fe87d 100644
--- a/src/com/android/launcher3/LauncherAppState.java
+++ b/src/com/android/launcher3/LauncherAppState.java
@@ -128,7 +128,7 @@
         mInvariantDeviceProfile = InvariantDeviceProfile.INSTANCE.get(context);
         mIconCache = new IconCache(mContext, mInvariantDeviceProfile, iconCacheFileName);
         mWidgetCache = new WidgetPreviewLoader(mContext, mIconCache);
-        mModel = new LauncherModel(this, mIconCache, AppFilter.newInstance(mContext));
+        mModel = new LauncherModel(context, this, mIconCache, AppFilter.newInstance(mContext));
         mPredictionModel = PredictionModel.newInstance(mContext);
     }
 
@@ -157,6 +157,7 @@
      * Call from Application.onTerminate(), which is not guaranteed to ever be called.
      */
     public void onTerminate() {
+        mModel.destroy();
         if (mModelChangeReceiver != null) {
             mContext.unregisterReceiver(mModelChangeReceiver);
         }