Revert "Use toolkit instead of renderscript in SystemUI"

This reverts commit 76ddc55b975b8df100f3df407a7563af59b4912d.

Reason for revert: This is breaking some Gradle builds, reverting while we figure out a more proper fix.

Change-Id: Ic6a89c805598620a36199ae66342279585221555
2 files changed