RenderScript VTS cleanup and fixes

This CL fixes the remaining VTS test cases for the RenderScript
vts-hidl-hal test and cleans up and improves the working test cases.
The goal is to have at least one passing test case per HIDL HAL entry.

Bug: 35915961

Test: mm and run on angler
Change-Id: I4b6e25831ce7d2abb3148c39eb48bde10ed04646
(cherry picked from commit 54fa8d42)