Prevent potential deadlock when sending pending intent in WCT

Post send pending intent while applying window container transaction to
prevent the potential deadlock between WindowManagerGlobalLock and
ActivityMangerService lock.

BYPASS_INCLUSIVE_LANGUAGE_REASON=using existing API.

Bug: 223365463
Test: pass existing tests
Test: manual check lock holding sequence and thread
Change-Id: I80f4671758dc930aa25381247280d44cccf4560c