Revert "Remove FLAG_ACTIVITY_CLEAR_TOP from ActivityStarterImpl."

This reverts commit 26deee874578a93707567f2de7a1ff3ab69b35b4.

Reason for revert: b/333831227

Flag: n/a
Test: n/a
Change-Id: I48716b949d76e7cbb3098c6b8a897917422b92e1
1 file changed