Deactivate the audio session after a call ends using the AVAudioSessionSetActiveOptionNotifyOthersO…

Deactivate the audio session after a call ends using the AVAudioSessionSetActiveOptionNotifyOthersOnDeactivation constant
since it is recommended for VoIP apps.

BUG=b/23356406
R=tkchin@webrtc.org

Committed: https://crrev.com/5a71f03f8bb0bd1691729717ab7ef22b1c3f94a0
Cr-Commit-Position: refs/heads/master@{#10673}

[henrika_webrtc, 2015-10-28 16:29:13]

Description was changed from

==========
Deactivate the audio session after a call ends using the
AVAudioSessionSetActiveOptionNotifyOthersOnDeactivation constant

BUG=
==========

to

==========
Deactivate the audio session after a call ends using the
AVAudioSessionSetActiveOptionNotifyOthersOnDeactivation constant
since it is recommended for VoIP apps.

BUG=b/23356406
==========

[henrika_webrtc, 2015-10-28 16:29:14]

henrika@webrtc.org changed reviewers:
+ tkchin@webrtc.org

[henrika_webrtc, 2015-10-28 16:29:35]

Zeke, PTAL

[tkchin_webrtc, 2015-11-16 21:40:34]

lgtm

https://codereview.webrtc.org/1418483004/diff/1/webrtc/modules/audio_device/i...
File webrtc/modules/audio_device/ios/audio_device_ios.mm (right):

https://codereview.webrtc.org/1418483004/diff/1/webrtc/modules/audio_device/i...
webrtc/modules/audio_device/ios/audio_device_ios.mm:95: success = [session
nit: 
maybe just break it onto next line (you can copy/paste the text to see the
formatting, it's not even width in CR tool)
success =
    [session setActive:NO
           withOptions:AVAudioSessionSetActiveOptionNotifyOthersOnDeactivation
                 error:&error];

[henrika_webrtc, 2015-11-17 13:52:32]

https://codereview.webrtc.org/1418483004/diff/1/webrtc/modules/audio_device/i...
File webrtc/modules/audio_device/ios/audio_device_ios.mm (right):

https://codereview.webrtc.org/1418483004/diff/1/webrtc/modules/audio_device/i...
webrtc/modules/audio_device/ios/audio_device_ios.mm:95: success = [session
withOptions:AVAudioSessionSetActiveOptionNotifyOthersOnDeactivation does not fit
within the 80-char limit if I do so. Keeping as is unless you think I should
break 80 here.

[henrika_webrtc, 2015-11-17 13:55:03]

Committed patchset #1 (id:1) manually as
5a71f03f8bb0bd1691729717ab7ef22b1c3f94a0 (presubmit successful).

[commit-bot: I haz the power, 2015-11-17 13:55:08]

Patchset 1 (id:??) landed as
https://crrev.com/5a71f03f8bb0bd1691729717ab7ef22b1c3f94a0
Cr-Commit-Position: refs/heads/master@{#10673}