Corrected the way that the settings for the new APM parameter scheme are applied in VoiceEngine

In VoiceEngine, the settings for APM are applied in such a way that
the previously specified setting is changed if it is specified to be changed,
and otherwise the previously specified setting is kept as it is.

This CL replicates this functionality for the way that the new APM
parameter scheme is used.

BUG=webrtc::6220, webrtc::6296, webrtc::6297, webrtc::6181, webrtc::5298

Committed: https://crrev.com/64d6ff77ffa326cb6132706f7ed3879081b0b92f
Cr-Commit-Position: refs/heads/master@{#15167}

[peah-webrtc, 2016-11-10 15:18:39]

Description was changed from

==========
Added sticky Apm Config

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

to

==========
In VoiceEngine, the settings for APM are applied in such a way that 
the previously specified setting is changed if it is specified to be changed,
and otherwise the previously specified setting is kept as it is.

This CL replicates this functionality for the way that the new APM
parameter scheme is used. 

BUG=webrtc::6220, webrtc::6296, webrtc::6297, webrtc::6181, webrtc::5298
==========

[peah-webrtc, 2016-11-10 15:19:25]

peah@webrtc.org changed reviewers:
+ solenberg@webrtc.org

[the sun, 2016-11-21 10:03:41]

lgtm

[peah-webrtc, 2016-11-21 14:04:40]

The CQ bit was checked by peah@webrtc.org

[peah-webrtc, 2016-11-21 14:04:41]

The patchset sent to the CQ was uploaded after l-g-t-m from solenberg@webrtc.org
Link to the patchset: https://codereview.webrtc.org/2489343002/#ps20001 (title:
"Rebase")

[commit-bot: I haz the power, 2016-11-21 14:04:49]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2016-11-21 14:28:14]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1479737080563960,
"parent_rev": ["4418ff41d76c14dab267ce480d2189af68ded85f", null], "commit_rev":
["3d9e1aef6a7c609f448cd0e4a0ecd92bc163366f", null]}

[commit-bot: I haz the power, 2016-11-21 14:28:17]

Description was changed from

==========
In VoiceEngine, the settings for APM are applied in such a way that 
the previously specified setting is changed if it is specified to be changed,
and otherwise the previously specified setting is kept as it is.

This CL replicates this functionality for the way that the new APM
parameter scheme is used. 

BUG=webrtc::6220, webrtc::6296, webrtc::6297, webrtc::6181, webrtc::5298
==========

to

==========
In VoiceEngine, the settings for APM are applied in such a way that 
the previously specified setting is changed if it is specified to be changed,
and otherwise the previously specified setting is kept as it is.

This CL replicates this functionality for the way that the new APM
parameter scheme is used. 

BUG=webrtc::6220, webrtc::6296, webrtc::6297, webrtc::6181, webrtc::5298
==========

[commit-bot: I haz the power, 2016-11-21 14:28:18]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-11-21 14:28:25]

Description was changed from

==========
In VoiceEngine, the settings for APM are applied in such a way that 
the previously specified setting is changed if it is specified to be changed,
and otherwise the previously specified setting is kept as it is.

This CL replicates this functionality for the way that the new APM
parameter scheme is used. 

BUG=webrtc::6220, webrtc::6296, webrtc::6297, webrtc::6181, webrtc::5298
==========

to

==========
In VoiceEngine, the settings for APM are applied in such a way that
the previously specified setting is changed if it is specified to be changed,
and otherwise the previously specified setting is kept as it is.

This CL replicates this functionality for the way that the new APM
parameter scheme is used.

BUG=webrtc::6220, webrtc::6296, webrtc::6297, webrtc::6181, webrtc::5298

Committed: https://crrev.com/64d6ff77ffa326cb6132706f7ed3879081b0b92f
Cr-Commit-Position: refs/heads/master@{#15167}
==========

[commit-bot: I haz the power, 2016-11-21 14:28:26]

Patchset 2 (id:??) landed as
https://crrev.com/64d6ff77ffa326cb6132706f7ed3879081b0b92f
Cr-Commit-Position: refs/heads/master@{#15167}