[hwc-batching] Surfaceflinger code for HWC batching support.

This CL adds the SurfaceFlinger side code for supporting the new
batched commands for createLayer/DestroyLayer.

Bug: 290685621
Test: atest VtsHalGraphicsComposer3_TargetTest
      atest PerInstance/GraphicsComposerAidlBatchedCommandTest
Change-Id: I1793bda0a1eac1c2cecd0c6ab00d5df9fd8d6d0a