device.mk: Collect and clean up gpu-related settings

Mostly this change just collects existing GPU-related settings into one
place so they can be found more easily. It also removes some vestigial
and redundant settings.

* Renderscript is deprecated and we never planned to include the RS HAL.
  But it was copied in (twice) from some previous device. Remove it and
  things that only the RS HAL depends on.
* The separate "*32" PRODUCT_PACKAGES entries were left over from when
  prebuilts had separate prebuilts modules for 32-bit and 64-bit
  variants of the package, instead of using a single multilib package.

Bug: 188672865
Test: boot to home, check all moved properties are still correct
Change-Id: Id9a9152b3b4c3a7167f147558f5f01da7f940311
1 file changed