Have the FinalShaderProgramWrapper / VideoFrameProcessor texture
output access textures provided through a texture pool, that
recycles used textures.
Also, add the TexturePool interface to generally re-use textures.
PiperOrigin-RevId: 532754377
(cherry picked from commit 1f9977f3c76891c6190da1d63045f61ce9b2050b)
