tree d890604c22a80cb810e8710a52834a372145e8d5
parent 5620699fb99cd4f56c9956e6a2cab99bab0126f8
author yifan.bai <yifan.bai@spreadtrum.com> 1463478079 +0800
committer Yifan Bai <yifan.bai@spreadtrum.com> 1463478463 +0000

Fix register multiple PhoneStateListeners.

To avoid multiple PhoneStateListeners are registered, when user changes
the tab between SIMs, unregister the previous listener.

Change-Id: I99cf36a2c25bfbb74322b55efc6d751ea96810e5