commit b8ef9f727314f0e9069aab6f1e8a2d909efbbbe7
author Yorke Lee <yorkelee@google.com> Fri Oct 31 07:17:50 2014 -0700
committer Yorke Lee <yorkelee@google.com> Tue Nov 04 12:04:40 2014 -0800
tree fe01f028ac30df8d12d575f64f5bec6f1ac0cdc1
parent e05642ba64551c6fc96dee79e65d223f9326a749

Make setting and unsetting InCallPresenter.mInCallActivity more robust

It is not likely because InCallActivity is single instance, but protect
against InCallPresenter.setActivity(null) being called by a second instance
of InCallActivity while the first is still active.

Also minimize the time InCallPresenter spends on the state where
mInCallActivity is not null but it is also finishing.

Bug: 18150786
Change-Id: I51ea5765cbc72cd9d0144d3f6bb6f64a7c8f17cf