Android CTS 5.1 release 4
[otlayout] Avoid invalid access with Context format 3.

Backport https://github.com/behdad/harfbuzz/commit/9df0a520 to our
present copy of HarfBuzz to fix a potential crasher.

Bug: 18789351
Change-Id: I89fc1dd7f9fd57f50babacea2b341a31e1bf41ee
1 file changed