Android 12.0.0 release 18
Increase the upper limit of slang target API to 31.

The slang compiler should be able to accept API levels up to the current
platform API level. Internally, any API level larger than N should be
treated as N since no new APIs added.

Fixes: 187523628
Test: build renderscript migration sample with minSdkVersion = 29,30,31
Change-Id: Ib16b9750c246c3e7c5827a2730ad9b71ff5aa847
2 files changed