Align 3 button nav with hotseat

* Animate translationY alongside icons
* When device rotates on home, update
translationY
* Add padding to contextual buttons to center
it

Bug: 189807374
Change-Id: I149ef25df570fb1fd385f1da960c827105ff975d
diff --git a/quickstep/res/layout/taskbar.xml b/quickstep/res/layout/taskbar.xml
index 83ad9f3..94d7d2b 100644
--- a/quickstep/res/layout/taskbar.xml
+++ b/quickstep/res/layout/taskbar.xml
@@ -42,6 +42,7 @@
             android:layout_height="match_parent"
             android:paddingLeft="@dimen/taskbar_nav_buttons_spacing"
             android:paddingRight="@dimen/taskbar_nav_buttons_spacing"
+            android:paddingTop="@dimen/taskbar_contextual_padding_top"
             android:gravity="center_vertical"
             android:layout_gravity="start"/>
 
@@ -62,6 +63,7 @@
             android:layout_height="match_parent"
             android:paddingLeft="@dimen/taskbar_nav_buttons_spacing"
             android:paddingRight="@dimen/taskbar_nav_buttons_spacing"
+            android:paddingTop="@dimen/taskbar_contextual_padding_top"
             android:gravity="center_vertical"
             android:layout_gravity="end"/>
     </FrameLayout>
diff --git a/quickstep/res/layout/taskbar_contextual_button.xml b/quickstep/res/layout/taskbar_contextual_button.xml
index cbbbfab..4ffb8d8 100644
--- a/quickstep/res/layout/taskbar_contextual_button.xml
+++ b/quickstep/res/layout/taskbar_contextual_button.xml
@@ -15,9 +15,7 @@
 -->
 <ImageView
     xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="@dimen/taskbar_contextual_buttons_size"
-    android:layout_height="@dimen/taskbar_contextual_buttons_size"
-    android:layout_marginTop="@dimen/taskbar_contextual_button_margin"
-    android:paddingStart="@dimen/taskbar_nav_buttons_spacing"
+    android:layout_width="@dimen/taskbar_nav_buttons_size"
+    android:layout_height="@dimen/taskbar_nav_buttons_size"
     android:background="@drawable/taskbar_icon_click_feedback_roundrect"
     android:scaleType="center"/>
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