Fix a number of edge cases with observations and remapping.

* Remap @replay_remap types in read and write observations.
* Remap pointers in read observations.
* Added whole load of tests for observations and remapping.
* Don’t defer writes - instead use the fence to call the function at the
  right point in the mutator.
* Return an error instead of panicking when reaching an unhandled switch
  case.

Adding my version of the fence detection code so that:
* Integration tests now pass.
* GXUI captures now replay.

I will test https://android-review.googlesource.com/#/c/153004/ after 
this CL, and if generated code is identical, take Ian’s version over 
mine.

Change-Id: I01a7faf7b852d593f4d9127be220bdcd88b95809

0 files changed, 0 insertions, 0 deletions