This CL replaces:
namespace webrtc_jni {
with:
namespace webrtc {
namespace jni {
The main benefit is that we don't have to use the webrtc:: qualifier
inside the jni namespace so we can reduce some clutter.
BUG=None
Review-Url: https://codereview.webrtc.org/3009613002
Cr-Commit-Position: refs/heads/master@{#19569}