[android] Bump up toolchain version.
[android] Bump up toolchain version.

BUG=chromium:502176
LOG=n

Review URL: https://codereview.chromium.org/1193843002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#29138}

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh