R.java file creation responsibilities will be moved to android_library
and android_apk targets and creating R.java files in the
android_resources targets is now deprecated. This cl migrates webrtc
targets to the new way.
Bug: chromium:1073476
Change-Id: I0a2fa759d3ff1d8e201e5719c9238701a58171e9
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/183060
Commit-Queue: Mohamed Heikal <mheikal@chromium.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32026}