JNI: Remove @NativeCall

In preparation of a refactor to use the JNI annotation processor,
the @NativeCall annotation is now deprecated. (Since when using the
annotation processor all native functions will need to be declared
on the top level class)

This CL refactors the remaining uses.

TBR=agrieve@chromium.org

Bug: 898261
Change-Id: Iead176a271774be58d06de27e35fa5d605f6ffc4
Reviewed-on: https://chromium-review.googlesource.com/c/1361584
Commit-Queue: Aiden Benner <abenner@google.com>
Reviewed-by: agrieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#613662}
12 files changed