Fix deadlock in MediaCodec::configure when peek default mode is used

This failure was not caught earlier during testing of this feature
because other test failures were hiding this one.

Bug: 220266078
Test: atest android.media.decoder.cts.DecoderTest#testTunneledVideoPeekOffAvc
Change-Id: I0228d87d96ab79bce6546d4c9f2b2ea73c60d79e
1 file changed