Use buttons for EncryptionInterstitial

Bug: 30742121
Test: Run EncryptionInterstitialTest via `am instrument`
Change-Id: I04d304da4153ebc7f8809ce9c640bccc5e1f5685
diff --git a/res/layout/encryption_interstitial.xml b/res/layout/encryption_interstitial.xml
new file mode 100644
index 0000000..331cdec
--- /dev/null
+++ b/res/layout/encryption_interstitial.xml
@@ -0,0 +1,69 @@
+<?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.
+-->
+
+<com.android.setupwizardlib.GlifLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:icon="@drawable/ic_lock">
+
+    <LinearLayout
+        style="@style/SuwContentFrame"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:clipChildren="false"
+        android:clipToPadding="false"
+        android:orientation="vertical">
+
+        <TextView
+            android:id="@+id/encryption_message"
+            style="@style/SuwDescription.Glif"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:baselineAligned="false"
+            android:clipChildren="false"
+            android:clipToPadding="false"
+            android:orientation="horizontal">
+
+            <Button
+                android:id="@+id/encrypt_dont_require_password"
+                style="@style/SetupWizardButton.Negative"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/encryption_interstitial_no" />
+
+            <Space
+                android:layout_width="0dp"
+                android:layout_height="match_parent"
+                android:layout_weight="1" />
+
+            <Button
+                android:id="@+id/encrypt_require_password"
+                style="@style/SetupWizardButton.Positive"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="@string/encryption_interstitial_yes" />
+
+        </LinearLayout>
+
+    </LinearLayout>
+
+</com.android.setupwizardlib.GlifLayout>