Allow remote views to be used in Tiles

If a suggeested action Tile has a remote view defined, inflate a card
layout to contain the remote view, instead of showing the default
title-summary layout.

Additionally, if the remote view has a view with ID
@android:id/primary, that will be used as the click target rather
than the entire card.

Test: cd tests/robotests && mma
Bug: 35668836
Change-Id: I0fd1b9c637b6d7a3d7d2f6268669917408a882eb

res/layout/suggestion_tile_card.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- 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.
+-->
+
+<FrameLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_margin="8dp"
+    android:background="@drawable/selectable_card"
+    android:clickable="true"
+    android:elevation="2dp"
+    android:focusable="true"
+    android:minHeight="@dimen/dashboard_tile_minimum_height" />