Share strings between native and Java

Creates a script that can be used to generate Java files to
expose native strings to Java, giving us a single source of
truth for these constants.

Bug: 937280
Change-Id: I1f0804bdfff8101dfd149612acd44360ae0dc2c0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1495747
Commit-Queue: Ian Vollick <[email protected]>
Auto-Submit: Ian Vollick <[email protected]>
Reviewed-by: Scott Violet <[email protected]>
Reviewed-by: Andrew Grieve <[email protected]>
Cr-Commit-Position: refs/heads/master@{#638754}
18 files changed