Rework NIU Actions buttons UI

The shapes, colors, icons, and layout of the NIU Actions buttons have been updated to match the latest UI specs. The icons also no longer overlap with the layout above them, which solves a picking issue.

Bug: 186004471
Bug: 187460625
Test: Manual (tried on Wembley and Pixel 3A)
Change-Id: Ie7a0ca0c21805fc0f126053ec791fd2460710d33
diff --git a/go/quickstep/res/values/colors.xml b/go/quickstep/res/values/colors.xml
new file mode 100644
index 0000000..9383770
--- /dev/null
+++ b/go/quickstep/res/values/colors.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2021 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>
+    <!-- Overview -->
+    <color name="go_overview_button_icon_color">#3C4043</color>
+    <color name="go_overview_button_color">#70FFFFFF</color>
+</resources>
diff --git a/go/quickstep/res/values/dimens.xml b/go/quickstep/res/values/dimens.xml
new file mode 100644
index 0000000..cb260b5
--- /dev/null
+++ b/go/quickstep/res/values/dimens.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2021 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="go_button_corner_radius">20dp</dimen>
+
+    <!-- Overview -->
+    <dimen name="go_overview_button_width">60dp</dimen>
+    <dimen name="go_overview_button_height">60dp</dimen>
+    <dimen name="go_overview_button_container_width">80dp</dimen>
+    <dimen name="go_overview_button_caption_margin">8dp</dimen>
+</resources>
diff --git a/go/quickstep/res/values/styles.xml b/go/quickstep/res/values/styles.xml
index 927c49a..df49ecd 100644
--- a/go/quickstep/res/values/styles.xml
+++ b/go/quickstep/res/values/styles.xml
@@ -15,12 +15,31 @@
      limitations under the License.
 -->
 <resources>
-    <style name="GoOverviewActionButton"
-        parent="@android:style/Widget.DeviceDefault.Button">
-        <item name="android:textColor">@color/overview_button</item>
-        <item name="android:drawableTint">@color/overview_button</item>
-        <item name="android:tint">?android:attr/textColorPrimary</item>
-        <item name="android:drawablePadding">8dp</item>
-        <item name="android:textAllCaps">false</item>
+    <style name="GoOverviewActionButton">
+        <item name="android:tint">@color/go_overview_button_icon_color</item>
+        <item name="android:backgroundTint">@color/go_overview_button_color</item>
+        <item name="android:background">@drawable/round_rect_button</item>
+        <item name="android:layout_width">@dimen/go_overview_button_width</item>
+        <item name="android:layout_height">@dimen/go_overview_button_height</item>
+        <item name="android:layout_gravity">center_horizontal</item>
+    </style>
+
+    <style name="GoOverviewActionButtonCaption">
+        <item name="android:fontFamily">roboto-medium</item>
+        <item name="android:textSize">14dp</item>
+        <item name="android:textColor">@color/go_overview_button_icon_color</item>
+        <item name="android:lineHeight">20dp</item>
+        <item name="android:textAlignment">center</item>
+        <item name="android:importantForAccessibility">no</item>
+        <item name="android:layout_width">wrap_content</item>
+        <item name="android:layout_height">wrap_content</item>
+        <item name="android:layout_marginTop">@dimen/go_overview_button_caption_margin</item>
+        <item name="android:layout_gravity">center_horizontal</item>
+    </style>
+
+    <style name="GoOverviewActionButtonContainer">
+        <item name="android:layout_width">@dimen/go_overview_button_container_width</item>
+        <item name="android:layout_height">wrap_content</item>
+        <item name="android:orientation">vertical</item>
     </style>
 </resources>
\ No newline at end of file