Fix initialization of AudioTrack related output parameters

Fix initialization of AudioTrack related output parameters

Since AudioCodecBridge::ConfigureAndStart creates AudioTrack
instance with config parameters, we need to initialize the
output parameters with the same values before we get
OnOutputFormatChanged().

Without this step the some changes between config and actual
parameters will be undetected, for instance before this change
(1) config_num_channels = 2, output_num_channels = 2
      old output value was 0, unnecessary AudioTrack recreation
(2) config_num_channels = 1, output_num_channels = 2
      old output value was 2, no change detected here but
      AudioTrack was created with num_channels = 1

BUG=none

Committed: https://crrev.com/42e063e46ffe17c98d198ebf1e046ad492e159ce
Cr-Commit-Position: refs/heads/master@{#398083}

[Tima Vaisburd, 2016-06-04 00:16:03]

timav@chromium.org changed reviewers:
+ qinmin@chromium.org, tsunghung@chromium.org

[Tima Vaisburd, 2016-06-04 00:16:03]

Reported and tested by Andy Wu, thank you!
PTAL.

[AndyWu, 2016-06-04 00:35:43]

lgtm

[qinmin, 2016-06-06 18:04:40]

lgtm

[Tima Vaisburd, 2016-06-06 18:07:44]

The CQ bit was checked by timav@chromium.org

[commit-bot: I haz the power, 2016-06-06 18:08:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2042563002/1

[commit-bot: I haz the power, 2016-06-06 19:12:50]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-06 19:14:13]

Description was changed from

==========
Fix initialization of AudioTrack related output parameters

Since AudioCodecBridge::ConfigureAndStart creates AudioTrack
instance with config parameters, we need to initialize the
output parameters with the same values before we get
OnOutputFormatChanged().

Without this step the some changes between config and actual
parameters will be undetected, for instance before this change
(1) config_num_channels = 2, output_num_channels = 2
      old output value was 0, unnecessary AudioTrack recreation
(2) config_num_channels = 1, output_num_channels = 2
      old output value was 2, no change detected here but
      AudioTrack was created with num_channels = 1

BUG=none
==========

to

==========
Fix initialization of AudioTrack related output parameters

Since AudioCodecBridge::ConfigureAndStart creates AudioTrack
instance with config parameters, we need to initialize the
output parameters with the same values before we get
OnOutputFormatChanged().

Without this step the some changes between config and actual
parameters will be undetected, for instance before this change
(1) config_num_channels = 2, output_num_channels = 2
      old output value was 0, unnecessary AudioTrack recreation
(2) config_num_channels = 1, output_num_channels = 2
      old output value was 2, no change detected here but
      AudioTrack was created with num_channels = 1

BUG=none

Committed: https://crrev.com/42e063e46ffe17c98d198ebf1e046ad492e159ce
Cr-Commit-Position: refs/heads/master@{#398083}
==========

[commit-bot: I haz the power, 2016-06-06 19:14:15]

Patchset 1 (id:??) landed as
https://crrev.com/42e063e46ffe17c98d198ebf1e046ad492e159ce
Cr-Commit-Position: refs/heads/master@{#398083}