Move gtest_isolated into a subdirectory

Make room for gtestifier by moving gtest_isolated into its own
directory.

Test: builds
Change-Id: I275a58fe6bde8e5b1db8679ad96c27bd5767461e
18 files changed
tree: 846c8c2e9e6af32fd30d5342d7c2f3460e0b0017
  1. gtest_isolated/
  2. PREUPLOAD.cfg
  3. TEST_MAPPING