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/AppStoreUtil.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.applications;
+
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.ResolveInfo;
+import android.net.Uri;
+import android.util.Log;
+
+// This class provides methods that help dealing with app stores.
+public class AppStoreUtil {
+    private static final String LOG_TAG = "AppStoreUtil";
+
+    private static Intent resolveIntent(Context context, Intent i) {
+        ResolveInfo result = context.getPackageManager().resolveActivity(i, 0);
+        return result != null ? new Intent(i.getAction())
+                .setClassName(result.activityInfo.packageName, result.activityInfo.name) : null;
+    }
+
+    // Returns the package name of the app which installed a given packageName, if one is
+    // available.
+    public static String getInstallerPackageName(Context context, String packageName) {
+        String installerPackageName = null;
+        try {
+            installerPackageName =
+                    context.getPackageManager().getInstallerPackageName(packageName);
+        } catch (IllegalArgumentException e) {
+            Log.e(LOG_TAG, "Exception while retrieving the package installer of " + packageName, e);
+        }
+        if (installerPackageName == null) {
+            return null;
+        }
+        return installerPackageName;
+    }
+
+    // Returns a link to the installer app store for a given package name.
+    public static Intent getAppStoreLink(Context context, String installerPackageName,
+            String packageName) {
+        Intent intent = new Intent(Intent.ACTION_SHOW_APP_INFO)
+                .setPackage(installerPackageName);
+        final Intent result = resolveIntent(context, intent);
+        if (result != null) {
+            result.putExtra(Intent.EXTRA_PACKAGE_NAME, packageName);
+            return result;
+        }
+        return null;
+    }
+
+    // Convenience method that looks up the installerPackageName for you.
+    public static Intent getAppStoreLink(Context context, String packageName) {
+      String installerPackageName = getInstallerPackageName(context, packageName);
+      return getAppStoreLink(context, installerPackageName, packageName);
+    }
+}