Add testing setter in generated JNI classes

Updates JNI wrapper to use the version that optimizes the
best with R8, and includes a testing flag/setter.

Bug: 898261
Change-Id: I343dd1a4f470fb8067dfd4cdb31d7c545b5f3717
Reviewed-on: https://chromium-review.googlesource.com/c/1308098
Commit-Queue: Aiden Benner <abenner@google.com>
Reviewed-by: agrieve <agrieve@chromium.org>
Reviewed-by: Eric Stevenson <estevenson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#604369}
1 file changed