Add a new utility to improve stack traces from automatic testing am: 6b56526bec am: 3d027127ae

Original change: https://android-review.googlesource.com/c/platform/frameworks/libs/net/+/1821095

Change-Id: I65e9cfc6d19add6bc4f57a6a4d99f671436c2ffc
tree: d5077f32fd8e38c6a28c3f405128b92d44ac912c
  1. client-libs/
  2. common/
  3. .gitignore
  4. OWNERS
  5. PREUPLOAD.cfg
  6. TEST_MAPPING