API review feedback for ThemedSpinnerAdapter, Spinner

Moves themed interface out of Spinner and extends SpinnerAdapter, updates
Spinner constructor to take a Theme rather than a Context.

Does NOT change BaseAdapter to implement ThemedSpinnerAdapter, because
the BaseAdapter class does not have any notion of layout inflation and
that would break the contract implied by ThemedSpinnerAdapter.

Bug: 21571899
Change-Id: Id7e8d630458857ce6c93a6a8b8f920e169ee1152
diff --git a/core/java/android/widget/CursorAdapter.java b/core/java/android/widget/CursorAdapter.java
index d8ce60c..9fb98db 100644
--- a/core/java/android/widget/CursorAdapter.java
+++ b/core/java/android/widget/CursorAdapter.java
@@ -38,7 +38,7 @@
  * columns.
  */
 public abstract class CursorAdapter extends BaseAdapter implements Filterable,
-        CursorFilter.CursorFilterClient, Spinner.ThemedSpinnerAdapter {
+        CursorFilter.CursorFilterClient, ThemedSpinnerAdapter {
     /**
      * This field should be made private, so it is hidden from the SDK.
      * {@hide}