Show app VPNs in always-on list

Bug: 22547950
Change-Id: I1b37f3b8d2a061f9f6fba3c8b9a95f3b7edcee64

src/com/android/settings/vpn2/AppVpnInfo.java

@@ -0,0 +1,46 @@
+package com.android.settings.vpn2;
+
+import android.annotation.NonNull;
+
+import com.android.internal.util.Preconditions;
+
+import java.util.Objects;
+
+/**
+ * Holds packageName:userId pairs without any heavyweight fields.
+ * {@see ApplicationInfo}
+ */
+class AppVpnInfo implements Comparable {
+    public final int userId;
+    public final String packageName;
+
+    public AppVpnInfo(int userId, @NonNull String packageName) {
+        this.userId = userId;
+        this.packageName = Preconditions.checkNotNull(packageName);
+    }
+
+    @Override
+    public int compareTo(Object other) {
+        AppVpnInfo that = (AppVpnInfo) other;
+
+        int result = packageName.compareTo(that.packageName);
+        if (result == 0) {
+            result = that.userId - userId;
+        }
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (other instanceof AppVpnInfo) {
+            AppVpnInfo that = (AppVpnInfo) other;
+            return userId == that.userId && Objects.equals(packageName, that.packageName);
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(packageName, userId);
+    }
+}