Refactor ActivityAllAppsContainerView to depend on ActivityContext.

All of the all apps search support is in this class which is also being
refactored to depend on ActivityContext. At the end of this refactor,
this class can be merged with BaseAllAppsContainerView.

Test: Manual
Bug: 216683257
Change-Id: I8cbf21c8d9ce97cc60e9846cfe8c2a7bcb800a01

src/com/android/launcher3/BaseDraggingActivity.java

@@ -216,6 +216,7 @@ public abstract class BaseDraggingActivity extends BaseActivity
      * Creates and returns {@link SearchAdapterProvider} for build variant specific search result
      * views
      */
+    @Override
     public SearchAdapterProvider<?> createSearchAdapterProvider(
             ActivityAllAppsContainerView<?> allApps) {
         return new DefaultSearchAdapterProvider(this);