Remove the libbacktrace references. am: d3c0e04407 am: cc362382dc am: 62ef10944d

Original change: https://android-review.googlesource.com/c/platform/system/libprocinfo/+/1806648

Change-Id: I9bc283c4bf4a23f1cfb9209782875ca886a28aa2
tree: ab68134ff3c69e1aba4dda193ae13178efd7be97
  1. include/
  2. testdata/
  3. Android.bp
  4. OWNERS
  5. process.cpp
  6. process_map_benchmark.cpp
  7. process_map_test.cpp
  8. process_test.cpp
  9. TEST_MAPPING