Move aapt2.mk before java.mk

aapt2.mk will export a srcjar that will be compiled by java.mk, so
it needs to be evaluated first.  Also move java_renderscript.mk
before aapt2.mk so that the generated resoures are available.

Bug: 73885582
Test: m checkbuild
Test: rm -rf out/target/common/obj/APPS/RsHelloCompute_intermediates &&
      m out/target/common/obj/APPS/RsHelloCompute_intermediates/src/R.stamp
Change-Id: Ide3050ec993a945f7077b75e952c3b3532306ede