Unit test tweaks

- Create a run_tests.sh script for layoutlib-create, and move files
around to make this possible
- Ensure logs go to stdout in bridge RenderTests
- Set java.library.path for bridge tests so android-host.so is found

Test: run_tests.sh
Change-Id: I31f257d2a603fba2b8e7b2f9d47d37dd9e2faaf2
43 files changed