Fyodor Kupolov 4d01f61e7b Do not enforce unlocked state when there is no caller
Do not enforce unlocked state when running on the background thread. User can
be in the stopping state or removed by the time the message is being processed.

Bug: 28471878
Change-Id: I1862849661d93b424a07ea94e80563bea7a94ce5
2016-04-29 17:27:16 -07:00
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