Merge the 2020-05-05 SPL branch from AOSP-Partner

* security-aosp-pi-release:
  Cherry-pick "Refactor Regexp.prototype"

Change-Id: I963f000d02507fae7a16981df2349fdd32db24a2
tree: 376f1116cea2d05d2c5384fe8feedb6b876518b6
  1. src/
  2. test/
  3. Android.mk
  4. LICENSE
  5. MODULE_LICENSE_BSD
  6. NOTICE
  7. README