Changes to installed app details screen for instant apps

Bug: 35098444
Test: make RunSettingsRoboTests

This implements the following changes to the app details screen:

-Suppresses the "Uninstall" and "Force Stop" buttons
-Adds "Install app" and "Clear app" buttons
-Adds a mechanism for showing a link to the store's app details
 page that can be different from the default for installed apps.

Change-Id: Icea83f7d1fde62d4101cb0c8a6d03849f6c56bca

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

@@ -16,6 +16,8 @@
 
 package com.android.settings.applications;
 
+import com.android.settings.applications.instantapps.InstantAppButtonsController;
+
 import android.app.Fragment;
 import android.content.Intent;
 import android.view.View;
@@ -29,6 +31,14 @@ public interface ApplicationFeatureProvider {
      */
     AppHeaderController newAppHeaderController(Fragment fragment, View appHeader);
 
+    /**
+     *
+     *  Returns a new {@link InstantAppButtonsController} instance for showing buttons
+     *  only relevant to instant apps.
+     */
+    InstantAppButtonsController newInstantAppButtonsController(Fragment fragment,
+            View view);
+
     /**
      * Calculates the total number of apps installed on the device via policy across all users
      * and managed profiles.