Add Open button to launch instant app.

- move logic from InstantAppButtonsController into
InstantAppButtonsPreferenceController, as it is not really necessary to
have separate control to be in different class.
- add logic to check if the instant app provides a default launch uri.
If so, show a Open button to launch the uri, and move the Install
button into option menu. If not, Install button remains as is.
- also update the instant app button layout to match the regular 2
buttons layout.

Change-Id: Ibcae780ad697ca93a48604b03c8f4600dd3c0472
Fixes: 69562807
Test: make RunSettingsRoboTests

src/com/android/settings/applications/ApplicationFeatureProvider.java

@@ -17,24 +17,13 @@
 package com.android.settings.applications;
 
 import android.annotation.UserIdInt;
-import android.app.Fragment;
 import android.content.Intent;
-import android.view.View;
-
-import com.android.settings.applications.instantapps.InstantAppButtonsController;
 
 import java.util.List;
 import java.util.Set;
 
 public interface ApplicationFeatureProvider {
 
-    /**
-     * Returns a new {@link InstantAppButtonsController} instance for showing buttons
-     * only relevant to instant apps.
-     */
-    InstantAppButtonsController newInstantAppButtonsController(Fragment fragment,
-            View view, InstantAppButtonsController.ShowDialogDelegate showDialogDelegate);
-
     /**
      * Calculates the total number of apps installed on the device via policy in the current user
      * and all its managed profiles.