When a recording session is stopped, no outstanding input video frames exist...

When a recording session is stopped, no outstanding input video frames exist for the output buffers returned from OMX component to SF.

When this happens, default value of 0 will be used for the "decoding" time for these output buffers.
These buffers do not contain valid media data anyway.

related-to-bug: 4725803

Change-Id: I0eaf248bb2ac022ff072eaffd0ed3f21171f824e