sdk/android/BUILD.gn has grown quite big and some structure is needed.
Since git blame history was already disturbed by a recent CL, this
is a good moment to do this.
This CL doesn't include any functional changes, it just reorders
targets.
Bug: webrtc:9048
Change-Id: I339ccb0da40fdc50b3f3f3b6b085a8cf0f591a1b
Reviewed-on: https://webrtc-review.googlesource.com/90046
Commit-Queue: Sami Kalliomäki <sakal@webrtc.org>
Reviewed-by: Paulina Hensman <phensman@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24084}
e09e6ef947