Remove IGraphicBufferProducer include.

We have removed references of IGraphicBufferProducer outside of libgui
so this include is no longer necessary. More information at
go/warren-buffers.

Bug: 342197851
Test: build and run
Flag: com.android.graphics.libgui.flags.wb_libcameraservice
Change-Id: Idebeb2d1c74cef0297aa49bd0eb0704084aee4aa