Reland "Enable libc++ on Android"

Switch all Android builds to use libc++ instead of stlport.

This change originally landed in crrev.com/315085, but was reverted in
crrev.com/315174 due to CQ execution time regressions.

The root cause of the test time regression was determined to be an issue
with MD5 hash computation, where hashing failed to produce a consistent
result in turn preventing deployment optimizations. This was resolved in
crbug.com/456396, leaving libc++ test runs comparable with stlport runs.

BUG=456396,427718

Review URL: https://codereview.chromium.org/951983002

Cr-Commit-Position: refs/heads/master@{#328296}


CrOS-Libchrome-Original-Commit: 9f355f21c4049c622c71fc66a50e0288c5211335
3 files changed
tree: d84f3405e26e6df4bdaf5f14fc3d22fbe044cf57
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/