Add AllAppsSearchPlugin

Bug: 151089843

Change-Id: I6d61fb9c7855bafee731f47147b3070a1b672071

src/com/android/launcher3/allapps/SearchUiManager.java

@@ -18,6 +18,9 @@ package com.android.launcher3.allapps;
 import android.graphics.Rect;
 import android.view.KeyEvent;
 import android.view.animation.Interpolator;
+import android.widget.EditText;
+
+import androidx.annotation.Nullable;
 
 import com.android.launcher3.anim.PropertySetter;
 
@@ -52,4 +55,14 @@ public interface SearchUiManager {
      */
     void setContentVisibility(int visibleElements, PropertySetter setter,
             Interpolator interpolator);
+
+    /**
+     * Called to control how the search UI result should be handled.
+     *
+     * @param isEnabled when {@code true}, the search is all handled inside AOSP
+     *                  and is not overlayable.
+     * @return the searchbox edit text object
+     */
+    @Nullable
+    EditText setTextSearchEnabled(boolean isEnabled);
 }