Sandbox renderscript genrules

go/roboleaf-busy-beavers-sandboxing

Bug: 307824623
Test: ./build/soong/tests/genrule_sandbox_test.py ImageProcessing-rscript ImageProcessing2-rscript ImageProcessingJB-rscript RSTest-rscript RSTest_v11-rscript RSTest_v14-rscript RSTest_v16-rscript Refocus-rscript RsBalls-rscript
Change-Id: I424e82dc36087fff5e98e63fbb30fca3e1efe7ca