WebRTC.Audio.InitRecordingDurationMs and
WebRTC.Audio.StartRecordingDurationMs UMA stats are added on Android
to measure the time consumed on these two methods where the main part
of the work is done in Java.
Bug: b/67854242
Change-Id: I2d5487511402db18009d66a39c66d3f10d98cdd6
Reviewed-on: https://webrtc-review.googlesource.com/37420
Reviewed-by: Sam Zackrisson <saza@webrtc.org>
Commit-Queue: Henrik Andreassson <henrika@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21494}