Add the classname to JNI method names to make them unique

Our JNI code generator generated a lot of Init(...) methods which
collided in jumbo builds. This patch adds a class name prefix to
them, and all other JNI methods, so that they have locally unique names.

[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected]

Bug: 779013
Cq-Include-Trybots: master.tryserver.chromium.android:android_cronet_tester;master.tryserver.chromium.linux:linux_site_isolation;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I86b6ac83c8e0a3507bd1d0efc48d625c12b4bb2b
Reviewed-on: https://chromium-review.googlesource.com/765973
Commit-Queue: Daniel Bratell <[email protected]>
Reviewed-by: Daniel Bratell <[email protected]>
Reviewed-by: Peter Beverloo <[email protected]>
Reviewed-by: Avi Drissman <[email protected]>
Reviewed-by: Rouslan Solomakhin <[email protected]>
Reviewed-by: Sky Malice <[email protected]>
Reviewed-by: Lambros Lambrou <[email protected]>
Reviewed-by: Yaron Friedman <[email protected]>
Reviewed-by: Luke Halliwell <[email protected]>
Reviewed-by: Ken Rockot <[email protected]>
Reviewed-by: Richard Coles <[email protected]>
Reviewed-by: Wei-Yin Chen (陳威尹) <[email protected]>
Reviewed-by: Miguel Casas <[email protected]>
Reviewed-by: Sadrul Chowdhury <[email protected]>
Reviewed-by: Paul Jensen <[email protected]>
Reviewed-by: Peter Kasting <[email protected]>
Reviewed-by: Bernhard Bauer <[email protected]>
Reviewed-by: agrieve <[email protected]>
Cr-Commit-Position: refs/heads/master@{#518300}
282 files changed