Introduce feature education for AllApps Search

Preview: https://drive.google.com/file/d/1eXf3K6kFh0bHcYlpwW_voSRjY9RQalJN/view?usp=sharing&resourcekey=0-IABjrtXM5JhHvSf-7yc4tg

Edu can be dismissed permanently by pressing "Got it" button or typing. Swiping down defers edu until next visit to all apps

- Move fallback search to quickstep
Bug: 178100472
Test: Manual

Change-Id: I920aab366330758e81f8b9fa62736abf82fe5cac

src/com/android/launcher3/views/AbstractSlideInView.java

@@ -64,7 +64,7 @@ public abstract class AbstractSlideInView extends AbstractFloatingView
     protected final ObjectAnimator mOpenCloseAnimator;
 
     protected View mContent;
-    private final View mColorScrim;
+    protected final View mColorScrim;
     protected Interpolator mScrollInterpolator;
 
     // range [0, 1], 0=> completely open, 1=> completely closed
@@ -216,7 +216,6 @@ public abstract class AbstractSlideInView extends AbstractFloatingView
         return mLauncher.getDragLayer();
     }
 
-
     protected static View createColorScrim(Context context, int bgColor) {
         View view = new View(context);
         view.forceHasOverlappingRendering(false);