libstagefright/SoftOpus: Ignore CSD resubmissions

NuPlayerDecoder re-submits the CSDs on seek. Opus decoder does not
need the CSDs on seek. So, we merely ignore the resubmissions of
CSD in SoftOpus so that it is not passed to the decoder thereby
screwing up its state.

Bug: 21565945
Change-Id: Ia74f4b1733e42171131484a6a7f3fd923fe26434
1 file changed