These tests hadn't been run in a while and had accumulated some rot.
This fixes most of the compile warnings and some tests which fail
incorrectly, but 2 failures remain on N6.
Change-Id: I7fee78cd058a32f4d7df40ec9f899ff767f68517
Extract the many different test fixtures and suites in SurfaceTexture_test.cpp
into separate files. No real functional changes, just tweaking headers to keep
things building (and adding a few copyright headers I forgot last time).
Change-Id: Id801bd5d617f0cc61d22508fb9b71b41694bdecf