Removing support for adding legacy shortcuts.

All existing legacy shortcuts will be migrated one-time to deep shortcuts
This shortcuts are pinned under the Launcher package, with custom badging

Bug: 275875209
Test: Updated unit tests
Flag: N/A
Change-Id: I7da001f724776ad8d6c807517b7e4e259de626c2

src/com/android/launcher3/views/ActivityContext.java

@@ -437,9 +437,7 @@ public interface ActivityContext {
                 StrictMode.setVmPolicy(oldPolicy);
             }
         } catch (SecurityException e) {
-            if (!onErrorStartingShortcut(intent, info)) {
-                throw e;
-            }
+            throw e;
         }
     }
 
@@ -459,16 +457,6 @@ public interface ActivityContext {
         }
     }
 
-    /**
-     * Invoked when a shortcut fails to launch.
-     * @param intent Shortcut intent that failed to start.
-     * @param info Shortcut information.
-     * @return {@code true} if the error is handled by this callback.
-     */
-    default boolean onErrorStartingShortcut(Intent intent, ItemInfo info) {
-        return false;
-    }
-
     default CellPosMapper getCellPosMapper() {
         return CellPosMapper.DEFAULT;
     }