Refactoring all apps search to support external search bar.

- Adding support for an external search bar that can be used
  to search a container view.  This adds a new interface
  AllAppsSearchController which manages the external search
  bar.  Each controller will have its own search implementation
  which means that we no longer need a common AppSearchManager
  interface.
- Removing elevation controller as we no longer have a builtin
  search bar in all apps
- Refactoring container view insets so that they behave
  the same in all containers.
- Refactoring apps view to ensure that we only update the number
  of columns with the available width
- Cleaning up LauncherCallbacks interface

Bug: 20127840
Bug: 21494973

Change-Id: I710b8e18196961d77d8a29f0c345531d480936fe

1 files changed, 13 insertions, 9 deletions

diff --git a/res/layout/widgets_view.xml b/res/layout/widgets_view.xml
index a1a62b32a..c27e79bbd 100644
--- a/res/layout/widgets_view.xml
+++ b/res/layout/widgets_view.xml
@@ -21,25 +21,29 @@
     android:id="@+id/widgets_view"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:paddingTop="@dimen/widget_container_inset"
-    android:paddingBottom="@dimen/widget_container_inset"
+    android:orientation="vertical"
     android:descendantFocusability="afterDescendants">
 
     <FrameLayout
-        android:id="@+id/widgets_reveal_view"
+        android:id="@+id/content"
         android:layout_width="match_parent"
-        android:layout_height="match_parent"
-        android:layout_gravity="center"
-        android:elevation="2dp"
-        android:focusable="false"
-        android:visibility="invisible" />
+        android:layout_height="match_parent">
+        <FrameLayout
+            android:id="@+id/widgets_reveal_view"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_gravity="center"
+            android:focusable="false"
+            android:elevation="2dp"
+            android:visibility="invisible" />
 
         <com.android.launcher3.widget.WidgetsRecyclerView
             android:id="@+id/widgets_list_view"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
-            android:background="@drawable/quantum_panel_dark"
+            android:layout_gravity="center"
             android:elevation="15dp"
             android:visibility="gone" />
+    </FrameLayout>
 
 </com.android.launcher3.widget.WidgetsContainerView>
\ No newline at end of file