- This removes a memory leak where some elements were not getting tracked
properly (and then triggering an assert when a context is destroyed).
- Convert ScriptCState to use a tracked object reference for mScript.
- Add a missing clear to FontState.
- Clean up synchronization in RSTest so that our graphics context outlives
any subtest context.
Change-Id: I0d5768c4d2f8810dd1ae2f68b1edd7e150f382fd
01f0ad7c13