Fix checkKeyIntentParceledCorrectly's bypass

The checkKeyIntentParceledCorrectly method was added in checkKeyIntent, which was originaly  only invoked when AccountManagerService deserializes the KEY_INTENT value as not NULL. However, due to the self-changing bundle technique in Parcel mismatch problems, the Intent value can change after reparceling; hence would bypass the added checkKeyIntentParceledCorrectly call.

This CL did the following:

- Ensure the checkKeyIntent method is also called when result.getParcelable(AccountManager.KEY_INTENT, Intent.class) == null.
- Migrate to the safer Bundle.getParcelable(String, Class<T>) API call
  in AccountManagerService.

Bug: 260567867
Bug: 262230405
Test: local test, see b/262230405
Test: atest CtsAccountManagerTestCases
Merged-In: I7b528f52c41767ae12731838fdd36aa26a8f3477
Change-Id: I7b528f52c41767ae12731838fdd36aa26a8f3477