Import fastrpc code from upstream

Imports latest fastrpc code from upstream-master branch. This import is
based off of c2d1cdc0fb781ee673077c5d4b243eb239c73bb5 from here -
https://android.googlesource.com/platform/external/fastrpc/+/refs/heads/upstream-master

Bug: 144318980
Test: N/A
87 files changed
tree: a1dda0b33986404edd6c17685c91df8cbd94d57f
  1. Makefile
  2. inc/
  3. src/