Camera: StreamSplitter: Return overwritten buffer to input

For Async buffer queue, if a pending buffer is overwritten by an
incoming buffer, onBufferReleased callback isn't called. But the stream
splitter depends on the onBufferReleased to return buffer to input.

Fix the problem by checking the bufferReplaced flag in
QueueBufferOutput.

Test: Camera CTS
Bug: 33777818
Change-Id: I270c7bae7873797ae9b050782828b5a124d3eff9