Clean up ART intrinsics.

Change `intrinsics_list.h` to a normal include file instead
of the weird include-use-and-undef pattern. Prefix macros
defined in that file with `ART_`.

And also remove blank lines at end of some files and address
some comments on merged changes.

Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Bug: 283082089
Change-Id: I9c462f973c0c4bb53eff39fbe191014f6321d7c5
24 files changed