Landscape support 1/n

Correct layout of theme/clock/grid picker fragment,
theme preview cards and custom theme still missing.

Bug: 125903559
Change-Id: Ibdfe9d9c5a6ad22039ec5581764990d7c775c8d5
diff --git a/res/values-land/dimens.xml b/res/values-land/dimens.xml
new file mode 100644
index 0000000..ecb78be
--- /dev/null
+++ b/res/values-land/dimens.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+
+     Copyright (C) 2019 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.
+-->
+<resources>
+    <dimen name="preview_page_gap">93dp</dimen>
+    <dimen name="preview_page_horizontal_margin">92dp</dimen>
+
+    <dimen name="options_container_width">400dp</dimen>
+
+    <dimen name="option_bottom_margin">8dp</dimen>
+</resources>
\ No newline at end of file