Add number of enterprise-installed apps to Privacy Settings page

This CL adds information about the number of apps that were installed
by the admin to the Enterprise Privacy Settings page.

Test: make RunSettingsRoboTests
Bug: 32692748

Change-Id: Ib710a1249db6d285da962122fd3dfb35a43752a1

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

@@ -20,6 +20,7 @@ import android.content.Intent;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
+import android.os.UserHandle;
 
 import java.util.List;
 
@@ -50,4 +51,9 @@ public class PackageManagerWrapperImpl implements PackageManagerWrapper {
     public List<ResolveInfo> queryIntentActivitiesAsUser(Intent intent, int flags, int userId) {
         return mPm.queryIntentActivitiesAsUser(intent, flags, userId);
     }
+
+    @Override
+    public int getInstallReason(String packageName, UserHandle user) {
+        return mPm.getInstallReason(packageName, user);
+    }
 }