ACodec: do not signal kWhatShutdownCompleted on codec error

Do not signal kWhatShutdownCompleted when moving to Uninitialized
state due to receiving a codec error.

Do not abort if error happens just before handling a stop request.

Bug: 13675112
Change-Id: I4b14b2e64cff0f71215d2bbc24cd850617dfb67b
2 files changed