Layout aligned to dp grid for portrait (1/3)

This CL sets fixed dp values for the recents item views based off the UX
spec.  Vertical margins will be handled by an item decorator in the next
CL to handle special cases.

Bug: 131610834
Test: Builds
Change-Id: Ieb7936bd24933552844a6bd1bdb9e3101b8cdca4

go/quickstep/res/layout/clear_all_button.xml

@@ -18,14 +18,12 @@
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/clear_all_item_view"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="@dimen/clear_all_item_view_height">
     <Button
         android:id="@+id/clear_all_button"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginVertical="16dp"
+        android:layout_width="@dimen/clear_all_button_width"
+        android:layout_height="match_parent"
         android:layout_gravity="center_horizontal"
-        android:paddingHorizontal="32dp"
         android:background="@drawable/clear_all_button"
         android:gravity="center"
         android:text="@string/recents_clear_all"

go/quickstep/res/layout/task_item_view.xml

@@ -17,14 +17,13 @@
 <com.android.quickstep.views.TaskItemView
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="match_parent"
+    android:layout_height="@dimen/task_item_height"
     android:orientation="horizontal">
     <com.android.quickstep.views.TaskThumbnailIconView
         android:id="@+id/task_icon_and_thumbnail"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:layout_marginHorizontal="8dp"
-        android:layout_marginTop="16dp">
+        android:layout_marginHorizontal="@dimen/task_thumbnail_icon_horiz_margin">
         <ImageView
             android:id="@+id/task_thumbnail"
             android:layout_width="match_parent"
@@ -39,7 +38,6 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_gravity="center_vertical"
-        android:layout_marginHorizontal="8dp"
         android:singleLine="true"
         android:textColor="@android:color/white"
         android:textSize="24sp"/>

go/quickstep/res/values/dimens.xml

@@ -15,5 +15,11 @@
      limitations under the License.
 -->
 <resources>
+    <dimen name="task_item_height">60dp</dimen>
+    <dimen name="task_thumbnail_icon_horiz_margin">16dp</dimen>
+
     <dimen name="task_thumbnail_corner_radius">3dp</dimen>
+
+    <dimen name="clear_all_item_view_height">36dp</dimen>
+    <dimen name="clear_all_button_width">106dp</dimen>
 </resources>

go/quickstep/src/com/android/quickstep/views/IconRecentsView.java

@@ -174,6 +174,7 @@ public final class IconRecentsView extends FrameLayout {
             mTaskRecyclerView.setItemAnimator(mDefaultItemAnimator);
             mLoadingContentItemAnimator.setOnAnimationFinishedRunnable(
                     () -> mTaskRecyclerView.setItemAnimator(new DefaultItemAnimator()));
+            // TODO: Add item decorator for vertical item margins
 
             mEmptyView = findViewById(R.id.recent_task_empty_view);
             mContentView = mTaskRecyclerView;