Print a warning message instead of throwing IllegalStateException

In TvInputManager.java, when postSessionReleased() is called but
onSessionReleased() is not called yet, mToken is null, and it's not
an illegal state.

Bug: 15095124
Change-Id: Icd2a84ae350d9979e3cef4dbd3a73699e05e7c2a
1 file changed