SurfaceTexture: fix SurfaceTextureGLToGLTest

This change fixes a couple different issues in the
SurfaceTextureGLToGLTest test fixture:
  - incorrect use of conditions
  - move logging after the locks are acquired
  - call the parent class's TearDown method
  - clean up the SurfaceTexture before eglTerminate gets called

Change-Id: I6960e5ab7f144225f01a2089d3f849c99fed0b38