GraphicsTracker: handle dequeueBuffer error while switching Surfaces

dequeueBuffer() can be called just after the output surface has
been switched. Ignore the error in the case.

Bug: 351820377
Test: atest android.mediav2.cts.CodecDecoderDetachedSurfaceTest#testDetachOutputSurface
FLAG: EXEMPT bugfix
Change-Id: I66058eab90d14418830fdbbbf3b6319bf585072f