Ignore instead of throw errors in QuittingState and reorder some parameters.

Since there could be an arbitrary number of messages in
the queue but Handler/Looper/MessageQueue do not provide
any mechanism for removing "all" messages the best we can
do is ignore. Throwing an error is probably too heavy.

Change-Id: I13c81ac5786484f5b3218885b010de596d943975
2 files changed