[fuchsia] Merge all fuchsia.hardware.goldfish.* FIDLs into one

Fuchsia CL: https://fuchsia-review.googlesource.com/c/fuchsia/+/330949

In this change we merge all the following FIDLs:
  - fuchsia.hardware.goldfish.address.space
  - fuchsia.hardware.goldfish.control
  - fuchsia.hardware.goldfish.pipe
into one single FIDL named fuchsia.hardware.goldfish.

TEST:
1) Run AEMU correctly
2) goldfish_test PASS, goldfish_benchmark PASS

Change-Id: Ib4e21ee488a464f2b81933ea6bc308084b761e11
7 files changed