Fix DragAndDropPolicy to use API

Use the ActivityOptions API instead of accessing the underlying Bundle.

The Bundle representing the ActivityOptions is internal and may change,
so accessing it directly should be avoided where possible.

Test: atest DragAndDropPolicyTest
Bug: 341140181
Flag: EXEMPT bugfix

Change-Id: I5962fdc8c33e692a992fd9c10e4bbb0465888186
1 file changed