Clear pair in recents if exit by other components

Split could exit by other components, but in such situation split
will not handle the transition, so we could clear pair in recents
when the founction called.

Fix: 292184502
Test: manual
Test: pass existing tests
Change-Id: I20d8d55c3f3f28d01407398b6de3cc7828e0caca
3 files changed